This private wooded lot that features 4/5 septic tanks, and 2 deep wells.

I'm looking for a history of slow/no pays, charge-offs, excessive revolving balances, unclaimed expenses (car notes, etc), and recent financial troubles.

Without getting into any deep analysis, I would say the first thing you need to remember is that if you're going to be owner-occupying the property as a househack, your equation changes entirely.

Ultimately it depends of the seller deep motivation to sale, if they need the cash to relocate or invest elsewhere the seller financing will not be a good option however for some sellers the benefits can be: Cash flowing without having to deal with tenants, maintenance property tax etc Depending on the terms you agreed on they can get a good interest rate on their capital Tax benefits Usually with a seller finance they will get a higher price for their property than with a cash offerIf you do a wrap and they have no equity it’s a good way to walk away from the liability and have someone else making payment under your name, in some scenarios it might even help fixing the seller credit score, however the mortgage will still be under their name and ultimately they’ll be hold responsible if you (the buyer) stop making payments.

Someone mentioned to me that the city is trying to slow down on expansion of homes to encourage affordable housing.  

(The @ function doesn't work very well if you have a slow connection)

One challenge to consider is that some cities are pretty slow so you'd have to sort out the holding cost of the land and fees to submit your rezoning plans to the city/county.  

Calm down, take a deep breath, relax.

I send deals to them, and they are slow to respond, like 5 days later.

Having been on multiple different forums for many different topics, I'm slow to fill in too much info.Daniel