To optimize a BRRRR I specifically look to add additional livable sq ft.

I will use this as necessary, should I need additional liquidity.   

I have a couple of properties that were part of larger trades and their attributes are different than SFR.

I'm employed full time as a sales engineer so real estate investing would be more a side project for me to earn additional income.As some of you may know, the Boston real estate market has been booming recently so the Boston metro area is probably outside my wheelhouse.

How much can we "pay ourselves" from the profit to avoid additional taxes?

Now still have 64K left which planning on using to secure 2 to 3 additional properties. 

Additional business docs wouldn’t hurt if you’re worried... but you should be ok.

I'm not sure about the brain drain because it was published when Amazon was looking for an additional HQ that engineers are hired faster here than any other city. 

I have some property management opportunities underway to help generate some cash flow on a steady basis, plan to act as an agent for some additional cash flow, and also have an interest in flipping homes. 

Taxes attributed to rental properties are reported on Schedule E or Form 8825 for an entity.