A potential tenant wants me to go in on half the cost of a privacy fence.

-The easiest way to do this is to even if you advertise via flip entity, just close the long-term property in the different entity.

We are currently working on purchasing the other half so we can call this a multifamily unit, rather than a single family.

Doing a cash-out refinance with a lender you worked with in the past is literally the easiest thing ever. 

Houses that are half-decent are getting way over ask right now.

(That I have found)-I will only physically be in this area for another year and a half.

I've paid about half of it already and there are only 7 more payments due til its paid off, and now what is happening is that they, sent me a threatening foreclosure letter stating that I owe them. 

That's the easiest and most common solution.

Over half of couples these days aren't married, so you might as well get used to this scenario.3) Do not, I repeat DO NOT say you "prefer families" over singles. 

That seems like the easiest way to increase cashflow.