I am going to reply to this
thread on the assumption that we are talking about equipment (and I mean something more complex than just a tool) and a farm/market garden or acreage to maintain as opposed to just a small vegetable garden.
Since we are talking about farm equipment, I am going to say that a compact utility tractor with a loader (as a sort of base machine) is the most useful piece of equipment that I can imagine. I realize that it is indeed possible to accomplish most/maybe all of your tasks without a tractor, and I also realize that a tractor is no trivial piece of equipment (especially in regards to expense), but having owned two tractors by now, I have found that a tractor is immensely useful if not indispensable on my property. To make things clear, I am not farming. I only have a few garden beds for my own consumption. However, I do own 9 acres, approximately 3 are wooded, 1 consists of the house and
yard, and the rest are open grasslands. In my opinion, by far the most useful part of a tractor is the loader. A tractor is basically useless unless it has at least one implement. With a loader (and assuming that the tractor is balanced for the loader, a crucial consideration when operating) I can lift extremely heavy objects with ease. I can scoop up dirt/mulch/gravel/etc. I can use the loader as a sort of power wheel barrow, moving heavy, bulky materials and then dump those materials on a specific site, or shut off the tractor and carefully scoop the material out of the bucket. Additionally, a loader/bucket combination is wonderful for moving piles of snow.
A small, almost trivial modification I strongly suggest getting with any bucket is getting some lift hooks welded on. My first tractor had no such lift hooks, and I made certain that I had these for my current tractor. The lift hooks make using a chain a simple, easy affair--you just place the chain link into the hook, wrap/attach the chain to whatever needs lifting, and then place the other end of the chain in the second lift hook. One use for both my tractors, made vastly easier with the lift hooks, is lifting and moving logs. 10 years ago a terrible wind storm (sustained 100 mph winds) toppled about 20 large
trees in my woods. It was heartbreaking, but I wanted those dead trees out to make room for new growth. I went into the woods with the tractor and chainsaw and eventually dragged most of the tree trunks out of the woods and today the woods are growing back nicely (though they will never be as before during my lifetime). A much more complex and involved modification for a tractor is to get a grapple. A grapple makes picking up large objects like logs an almost trivial affair. My point about the loader here is that I could never have moved all those logs without the tractor and loader. The
wood was simply too heavy. Just after the storm, at least 10 of those large oaks and hickories were laying in my backyard, almost touching my house (I was lucky, there was no serious, structural damage, only loose shingles--others were not so lucky) and I had to get all that wood moved. At that time I had not discovered Permies and ALL wood chippers in the area (perhaps a 100 mile radius) were already rented for weeks in advance by the time I tried to get my hands on them. My only solution was to cut the bulk of those trees up and burn them, but in doing so I had to move them first. I simply could not have done so without the help of the tractor--I loaded up the bucket with four 18" diameter sections of trunk about 2-3 feet long and moved them bucket by bucket over to a pair of fires that burned furiously for two weeks non-stop.
If we move away from the front end of the tractor, we can talk about the 3 point hitch and PTO. All rear attachments will attach by a 3 point hitch and any that need power (like a mower, tiller, etc.) will get it by the PTO. Even a subcompact tractor can make use of a vast and increasingly large number of rear implements sized to these small but mighty tractors (the subcompact tractor is the fastest growing segment of the tractor market). I have run rough cutters, rear finish mowers, flail mowers (a somewhat rare but absolutely amazing mower), scrape/grader blades and box blades with my old subcompact tractor. The list of implements sized to the subcompact tractor only increases each year. In addition to moving logs, my old subcompact tractor rough mowed tall grass, mowed my yard with a finish mower, excavated ground for an above-ground pool using a box blade to loosen and dig earth while I moved the earth with the loader, cleared snowfall from my driveway using a grader blade and loader.
Most tractors and all subcompact tractors also have a mid-PTO. This is only useful for a mid mount mower, a snow blower and a front mounted rotary broom. I have never actually seen the broom option used, but many people use the mid mount mower as their lawn mower and the snowblower is indispensable in snow country. Finally, these small tractors (and certainly larger tractors) can pull a sizable trailer. These are not garden carts mind you, they are full sized trailers that might also be used behind a pickup truck. My subcompact tractor pulled an 8' trailer that we also used as a sort of pickup truck bed that we also pulled behind our mini-van (a sort of marriage compromise). The trailer was big
enough that we could go to a
local hardware store and get a sizable load of lumber or other bulky/heavy items. Once back home I could hook the trailer up to the 3 point hitch of the tractor and the normal, non-dumping trailer turned into a partially dumping trailer simply by raising the 3pt hitch which tipped the trailer back and made unloading mounds of chips much easier.
By now I think I have made my own opinion clear: I think that a tractor, even a small one, is indespensible for a person with acreage. The last note I will leave is that it is best to size the tractor to the
land and expected uses. When I first bought a tractor, I bought a subcompact because it was the cheapest, the budget absolutely dictated so, and I really needed a real tractor before our next winter in order to clear my 400' driveway. This tractor served me faithfully for 13 years. It was remarkable powerful for it size and weight and it could do just about any task a larger tractor would perform but would take longer. I sold the tractor in part due to an old back injury that made mowing our rough acreage long and painful. The new tractor is perfectly suited to the size and tasks I ask it to perform and I will be making some modifications to it in the coming years. To be perfectly fair, tractors and their implements are not cheap (the reason I under-bought in the first place), but since we are talking about usefulness, I think the tractor fits the bill very nicely. They will cost about half the price of a new car, but they will last a lifetime if given their minor maintenance requirements. I have never had a major breakdown (I once rolled over a
locust thorn that tore a nasty gash into the sidewall of one of my front tires, The front tires had to be replaced, but this is about the most major repair I ever had), something I can not say about the cars I have owned in the same time period.
In ending, I would say that if you have the land and thus the need for it and if you can afford one, a tractor is immensely useful.
If you have any other questions or if I made anything less than clear, please don't hesitate to ask and I will try to clarify.
Eric