A few things come to mind:
1) Why hasn't it been severed already, if common to be severed in the area? I can see a few reasons.
a)The owner is trying to get rid of it fast, trying to make a quick buck, or tried to, then realized that severing was probably going to be a bad idea. I'm sure RT would've suggested it to the owner, they're a big influential RE firm. This can be used to your advantage to offer a lower price. Also, your offer can be lowered as the time on the market increases, as always.
b)Limited severance capability. That landscape there has a steep slope facing the SE, if my memory of the area serves me right. [Probably] only the pastureland would be suitable for severance, and then if you did sever and start that eco-village, you'd have to use the most valuable area, or sever the less desirable plots, resulting in less money for the plots.
2) In order to make it work, you'd need to make $2,800 of profit per month to pay the mortgage (3.5%, 550k mortgage), plus a bit more for insurance, taxes, and your own personal time on the property developing and cultivating it. For the sake of a round number, $3,500 just for basic, and $5000 so you can pay yourself a bit. Can you see ways to make this kind of money?
Volunteer labour would probably be your best bet at first. Multiple streams of income definitely. Grazing, selective logging - the deadfall and elms could bring in a fair bit-, mushrooms. Rent out some plots in the forest for RVs/tent trailers. Outdoors meeting areas, fall wedding venues. Hunting leases in the fall - the marsh in the north half, as well as the pond, should help attract waterfowl. Tree seeds and seedlings. Graze organic or beyond organic pigs in the woods. At 200lbs dry weight, you'd need around 25-30/year to make a large dent in your payments, but maybe the land can't support it.
Can you afford to spend some of your leftover monthly income from your current job to maybe supplement the mortgage payments in lean years? Do you have the time for this enterprise? If you go all-in, can your significant other support both of you. Do you have the connections, if you have the time to do all of these things, to help you market and sell these products?
If you do get in this enterprise, I'm willing to help in any way I can, living 2 hours away and all. Look into vendor financing, or "rent-to-own". Look at how you can use your neighbours and your friend's farm to help. There's that big compost facility on Joyceville Rd opposite your property. Horse farm on the NE corner of the Joyceville/Middle Rds intersection. Heck, even the Husky gas station by the 401. Make a business plan. Look for government grants, a multitude of microloans from family and friends. Consider incorporating.
If this seems too much, and you can't find enough financial help to make it work, consider John's post with the property on Con 4. Just 5 clicks further away.
Ok, my brain is fried now, if I can think of anything else, I'll let you know.