DOM nationwide isn't really terribly useful; in extreme situations we will already know the national economic situation.

Is this ok, or is this a terrible first BRRRR? 

I would like to do some research on other rental properties before I set my priceComputer algorithms are good for studying a general market, maybe even a neighborhood, but they are terrible for evaluating a specific rental.

What's the lowest credit score you will allow?

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.

For me, I am a little hesitant because I would be in a situation where I would be trying to secure traditional lending (which should be very feasible given credit scores & what $$ amount I am pre-approved up to from my banks), meaning that I assume I would be forced into using my first-time homebuyer loan incentives.

House hacking seems like the best strategy for me.My goal is to purchase a single-family home in Maryland, D.C, (from lurking I've heard D.C was terrible for investing) or Virginia with multiple rooms where I'm making monthly payments similar to what I pay in rent and other charges ($2000-$2500).

I've seen too many investors find a good property, then hand it over to a terrible PM and the entire thing fails. 

That's not the same as paying cash.According to a different post, your credit card debt costs you $600/month.

You can work with a local credit union that does HELOCs, Home Equity Lines of Credit or Loans, on investment property.