Quote from @Na Wilson: I have a source (depending on credit score) that can do a 90% LTV DSCR loan on non-owner occupied real estate. 

You can pre-screen them for free, then run the credit/criminal background only for those that pass your initial review so you're not wasting time.

DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.

I want to find a way to get a revolving line of credit, or hard mony loan for this trailer house w 4 acres above.

You already have US based credit so that is good. 

Zero-percent business credit lines can be a great tool to fund renovations, repairs, and even serve as gap or bridge funding when working on a BRRRR deal.

Just as a comparison for using greater Cincinnati credit union they have at top tier credit score 6-7% on 7-12 year fixed rate loans, 9.5 on variable loans and 5.25-6% on 10-30 year loans.

Do you usually screen tenant (credit score, income etc) just like the LTRs?

They have come to me about buying the home but I have a collection account about to fall off my credit in a few months so I am not sure I would qualify (in addition to my income may not be high enough).Are there any workarounds to maybe purchasing the home?

Lowest credit score of 713 and other 2 scores both 760+.