There shouldn't be any money due from you unless the fee the seller's agent pays is unusually low. 

@Jon RolandHave you looked into Brandon T's book on investing investing with no and low money down?

Hello BP,My brother and I are planning on purchasing a multifamily with an FHA loan to house hack. My brother has a constant monthly salary (web developer), whereas my monthly salary is more random (restaurant server)...

If your considering raising rents by a large amount, maybe you should wait until the end of the year as an eviction could possibly push you into winter, where your pool of potential  good tenants will be low. 

@Nathan G. the leasing companies have driven equipment and installation costs so low that the systems are relatively cheap for them to install, and they sell the tax credit to entities looking for a tax haven, so that helps them recoup most of their initial investment and selling energy is gravy on top.

My long term real estate goals for this area are to be influential in helping figure out our low income housing crisis here, so it would be awesome to connect with any like minded people.

You might also have luck calling the local building supply houses - not Home Depot/Lowe's.

Probably 2500 in low season. 

Conservatively underwritten low double digit CoC and high teens IRR is standard. 

So you don't make as much money as you would with a sandwich but there's less risk and you can sometimes do the deal even when there isn't enough equity or a low enough payment for a sandwich to work.