What I did get, was on a marketing email list that sells their other virtual products.

This would be a prohibited transaction since you're a disqualified party and anything you already own (your LLCs) is part of that. 

I’d look into the cost of a 500 sq. ft. garage and compare it to the potential boost in sale price.

Yes, Oklahoma is a great market to consider, especially for multifamily properties:Affordability: Oklahoma City (OKC) and Tulsa have duplexes and small apartment buildings within a reasonable price range.Landlord-Friendly Laws: Makes property management less stressful.Stable Cash Flow: Properties in Oklahoma often meet or exceed the 1% rule, providing consistent rental income.Growing Economy: Both cities are seeing population and job growth, boosting demand for rentals.Tips for Getting Started:Do Your Homework: Use tools like BiggerPockets calculators to analyze deals and ensure cash flow.Focus on Neighborhoods: In OKC, check areas like Yukon, Edmond, or Midwest City.

You’re in a great position with a property that’s appreciated significantly, a low-interest mortgage, and clear goals to boost cash flow and transition into full-time investing.

Target neighborhoods like Brewerytown, Kensington, and Point Breeze, where demand and ARV potential are currently strong.Your skills in renovations will give you a significant edge in controlling costs and boosting returns.

And where I could boost the rents 20% over a four year period.  

I want to obtain more properties through other loan products but unsure where to start.

Brewerytown and East Passyunk could also be worth exploring.Big projects like Bellwether can boost neighborhoods, but they often take time to show results, so don’t count on them as a main factor.

I have riders in my policies that boost my stated dwelling coverage by 25% in case costs rise.