We have always bought outright with our own funds, but these are tied up at the moment.Admittedly, I don't have alot of experience with subject-2's-- I need to learn more on this type of deals.Thanks for the response here.. everyone.

If you were wanting her to trim trees on her side, then, frankly in her shoes I'd have told you want you can do with your bucket truck.  

Furthermore, I doubt that the pier is physically tied via post-installed anchors so there's no lateral resistance or moment transfer.

I would find the money to pay cash for the dirt.. use your expertise to subdivide.. and if your state is like ours a 4 lot partition is not a subdivision and rules are a lot easier.. then find a builder to hire per door.. and build them out with you as the principal.. this will take of course  significant cash and credit to do.. and profit on those numbers your talking about at that land cost is not super high.. might just tie up the dirt split it and sell the lots and make the lot profit..

I don't think it makes sense to tie either to % of rent as they are independent of how much $$ comes in. 

I was told once that there was a loan for investment properties tied to the rental revenue.

You will be amazed at how suddenly payment of rent becomes more important than buying new shoes or paying for a new transmission for their GMC.

Other LEGAL uses would be to take on a partner, tie up a property for a relative and then assign to them (without a fee), etc.

If so, that’s a big plus, but you’ll have to pay the city something to tie in each unit.We spent about $100K for 2 tiny houses, furnishings, a/c, roads, electric, and septic.

You’re already out at least a full month’s rent tying to use this realtor.