Although I'm really grateful for my current employment with the military, it's a bit sporadic and unpredictable in terms of schedule and income.

My three main methods that I use currently are rentometer, comps from my realtor, and apartments.com.

This method will be less expensive however you will need to provide more training/guidance and set clear expectations on what you are looking to achieve.

This is my first time doing the brrrr method but i own a triplex. 

The Solo 401k is typically the preferred structure for those who are self-employed or own a business without employees.

Most BRRRR method properties will be around 200% return. 

Just looking for quick and dirty estimates for now, but I'm definitely open to recommendations on other methods to get more specific numbers.

DSCR loans are available, closing costs and rates may be higher but I have seen 80% LTV cash-outs on the private side with no DTI, tax return, or employment requirements with much fast close times / less seasoning.

Jobs will rarely give you the kind of money you need to invest, but if you can mix hard money, crowdsourcing, business credit, and one-to-one private money, you can focus your attention on buying houses below market value and either flipping them or rehabbing them, renting them, and refinancing them.I prefer the second method because it allows me to keep a flow of cash growing behind me, but to make it work you need the best deals so you never have to leave your money in the deal.

I'd also say the layout of the units will have a lot to do with how successful the rent by the room method would be.