WHile there are many aspects to protecting the LLC's corporate veil, two major ones are co-mingling funds and using it as your alter-ego. 

@Kevin MahoneyA lesson I learned from my first BRRRR is to understand your source(s) of funding and exactly how those sources translate to holding cost during a rehab.

Stairs can be very costly if added since the live load of the structure has to be altered.

Having those 4 units vacant and in need of repairs might translate into less desirable terms, though you can always refi, just double closing costs 

I think what you might be meaning/ hearing  is that there is a 1% loan fee  adjustment for a 2-plex  versus a SFR ..this would translate to a rate  differential of  approx. .25% - .375%

Being a numbers guy translating an arbitrary % to "occupied months" is shifting my paradigm.My dumb question: what math/inputs are you using to translate 3% vacancy to 333 1/3 occupied months?

If the property notices were not given, the 180-day redemption time period can be extended to one year.Aside from issues related to the particular property foreclosed, lenders have differing needs that translate to different time periods before listing on MLS.

[Also, is it now officially a triplex, approved by the city and altered on their books now?]

I was more concerned with the strip of grass between the sidewalk and street (dunno if I can alter that)

can you alter garage,, do a pull thru garage - garage door on both ends so you pull thru to back yard.. and or you use any other area of the yard for legal parking,, is it a corner lot..