It depends on what you mean by self sufficient. You likely can not get it growing enough directly to feed you in that time. But you already have an established crop in the maples so if you can produce enough from that to
sell them buy other foods maybe.(or trade)
So lets take an example(not how I would want to live but something I can at least put some roughly fair numbers to) If each person needs roughly 400 lbs of grain per year to live and grain is say $0.50 a lb you are looking at $200 a year worth of grain per person. Now will how ever many acres you will have of forest produce that in syrup each year to get that grain? What else do you need for self sufficient? Home heating and cooling?, cars for transport? property tax payment? Etc? My guess is that unless you mean self sufficient at the most basic level it isn't possible in 5 years unless you have practically unlimited resources.
But what else do you need to reach for that goal?
1. You will be cutting down trees.
A. Some will be used to keep construction costs down,
B. smaller branches will be used for a hugelkulture pile along the north edge of your cleared garden. Why north edge? Because it lets you tap more of the sun light by shading forest floor behind it rather than land you can use to grow something
C. You will have crotches and
roots etc that are bigger but not good for construction material. Get the spawn treated wood dowels and grow mushrooms with these back in the trees somewhere. This one you can on a smaller scale longer term by cleaning up dead branches etc.
2. Another thing you can do with the forest is growing some sort of forager that can survive in the forest.
Chickens, turkey, guineas etc. They don't need huge amounts of light. And if you raise them seasonally little or no feed to carry thru the winter. Likely you will want a few laying hens that you do partially feed thru the winter and a larger number of meat birds you raise seasonally when they can mostly forage for food. That means 2 coops. The coop should be roughly in the middle of the property to hopefully allow them to free range without anything but a small coop
fence for the laying hems for mornings ideally(5 acres is marginal for those but choose the right species and likely you won't need chicken property fences) Since ideally you want to move manure as little as possible ideally likely puts cleared garden area near middle too.
3. Will likely need out buildings. To minimize loss of forest they should be on skids so the ground under them is left exposed so the tree roots can get oxygen and the roof should be designed to carry precipitation back under the building to water the trees. And then the buildings moved back in the trees. Since they need to go between trees likely the building will be narrow one direction.
4.
Honey bee hives. Built into an out building or on a roof of an outbuilding to reduce raider damage? There again both food and something for trade or sale. Can you add some sort of vines that flower to the mix to grow up some of the trees?
5. You are going to need a steady fuel wood source possibly for home heating and most definitely for boiling the sap down so something you can copice and grow for fuel needs to be on that list. Some of this you will be able to get from branch debris, dead trees etc cleanup but likely not enough and this is one you need to locate early in the process so has harvestable by your 5 year point. Willow maybe?
6. Cleared garden area. If you can do
greenhouse or high tunnel here and increase the growing season so much the better. The more productive each square foot of ground is the better and one way to do that is more growing days. Longer term you will likely want nut and fruit trees and because they get taller they will likely be located most on the southern edge of the garden space. Brambles and other shade accepting crops you can probably hide out in the forest or the edges of the forest.
7. home. ideally right on a road edge to minimize land lost to road, Probably a tall building on the northern edge of the garden area to maximize light caught. Ideally with a
greenhouse built in. Ideally with
solar thermal heating built in to heat everything and also do the first stages of the sugaring of the maple syrup. Because you want to able to use waste heat both ways the house should be near the lowest location to so your sap lines can all run to it.