The combination of affordability, appreciation, and rental demand definitely makes OKC an interesting market.

One strategy you can explore is a combination of 0% business credit cards and hard money.

For example, I mention that every adult must pay a $XX application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

Partner with Other InvestorsPool resources: Partnering with other investors allows you to combine your capital and expertise to invest in larger or more complex deals that you might not be able to do on your own.    

Quote from @Dylan Webb: Hello, here's my situation:My wife and I own several properties separately.2 of the single family homes combined we have conservatively $150,000 in equity ($90,000, $60,000) I want to use one of these as collateral for a small loan of $30,000 to put down on a high cash flowing property OR have a lender finance the whole venture at a purchase price of $160,000.

Start researching price to rent ratios in areas and see which area has the best combination of cash flow/place you want to live!

I have been looking at sf homes with comparable SqFt to one of the units, as well as the units combined to try and get a feel for what this is worth.

You could use a combination of the move out inspection from the previous tenant and listing photos.

I am planning to build a portfolio dashboard for my properties in Excel, and I have a pretty good idea of what I want to see about them individually and combined. 

However, you do not need to file Form 8832 because IRS rules allow a married couple in a community property state to elect disregarded entity treatment by default.