The whole apartment except the kitchen was carpet.

(and with no late fee until July 16th) The reason for this is that mortgages are paid in arrears (except for the month closing which I will explain below).

Actually they use only the bare minimum to build modular homes, with the exception of 2x6 walls which is common in mods.

This lien is a superpriority lien, so it sits ahead of all mortgages and nearly all other liens (liens held by the US Government are a notable exception).

These should reflect your situation, except for your actual home insurance costs.

REALTORS® shall recommend that sellers/landlords obtain the advice of legal counsel prior to acceptance of a subsequent offer except where the acceptance is contingent on the termination of the pre-existing purchase contract or lease.

i think flipping is exceptionally difficult right now. 

So MF unit over 15 years old is rent controlled (with a couple exceptions mostly for owner occupied 2 units) and MF unit that is under 15 years old is not rent controlled (again with some exceptions but they are unlikely to be applicable).  

Fast forward through some vital life experience, I’m back on BP with a desire to jump back into my goal of having a cash-flowing rental portfolio that can help support me.

The deals that work in this environment will be exceptional in a lower rate scenario so more than likely you'd be hitting a homerun if it works well now.Not to say you could still hit a few singles that work moderately well now and slightly better later.