Why would clearing land be "environmentally irresponsible", especially to an "extreme" degree? I could understand if you were talking about clearing say, Central Park, the last green space in a extensive urban environment; but the Pine Barrens are not short of habitat, green space, or vegetation.
You are replacing one ecosystem for another, albeit managed, ecosystem with an orchard and garden. It is expensive. But it is also a negotiating point. People with wooded lots love to use the comparison of the more expensive developed property in their area. Only natural. But a smart buyer calculates what a property would be worth in finished form, adds up the cost of all the work and infrastructure to get it 'perfect', subtracts that from the comp; and that becomes their opening offer. Sellers don't like this, because they think their little slice of heaven is every bit as good as their neighbors. However, THEY don't want to spend the money to bring it to the same standard. Doing the math helps them be more reasonable.
One idea for affordability, if you are committed to this area, is to get good at clearing and preparing land. Buy a small lot. Clear it, either by hand or rent equipment. Put in lights, culvert and a water source; perhaps even a septic system. Then sell it for a tidy profit and move up a category. You are building equity, while learning the skills to make your (bigger) place a reality. There are many people, much like yourself, that want to buy a piece of property; but don't know or want to develop it. Become the broker of their dreams, while you build equity to realize yours.
I do speak from (limited) experience. I could not afford what I wanted. I started small. I found an area that had almost completely undeveloped lots. I went into the tax records and contacted people to see if they would be interested in selling. I found a bunch of folks whom were either overwhelmed by the task or disillusioned by the dream. I bought 5 lots. I started clearing. Here are a few things I learned. Dozer operators want way too much money to tear up my land. There are better heavy equipment choices that can be hired or rented, if you are willing to learn how to operate them. Time is money. A pro might be able to do it faster and cheaper than you can if you are renting equipment you are unfamiliar. However, it can be done by the 'average person'. You should check out a "skid steer" with a land shark attachment.
In my area, I was quoted around $1700 a day (not bad); but they did not want me to pick it up, due to the weight; even though I have 14K gvwr trailer and a 3/4 ton truck. They wanted to deliver it and pick it up - to the tune of $500 each way. (I think somebody had a brother in the hauling business.) It is the second best but most reasonably priced option for equipment rental.
A forestry drum is the absolute best, but prohibitively expensive. BobCat said, "yes", they had one for rent. But the minimum was a weeks rental at $10k a week, including delivery. I only have two acres not a forest. That is maybe a couple hours work for this thing. A dozer operate was half that price.
I tried a few other options from rental companies; but with limited return on investment of time and money. What I have finally found works best for my situation (a couple of acres and trees in the 4-6 inch range and lots of underbrush) is a rotary brush cutter and a shredder. The brush cutter is like a circular chain saw. It whips through stems as you walk with no bending over to get to ground level. Once a big patch is cut; back the shredder into the clearing and start feeding branches and small trees. A brush cutter purchased is less than $300. A shredder rented from a local tool supply company (or big box) is less than $100/day. Once the stuff is on the ground, you will be amazed at how many tons of vegetative matter you can run through a 6 inch chipper/shredder in an hour.
It is time consuming, but worth the investment to get a rough property into shape on a tight budget. Hope this helps.