Thank you so you have any suggestions on resources about underwriting?

I would suggest learning how to analyze property.

Additionally, don’t overlook the opportunity cost of pulling money from your 401k—those funds could have been compounding in the market.I’d also suggest stress testing your ROI by running scenarios with higher expenses or lower rents to see how resilient the investment is.

My lender suggested moving a multi-family from my personal name to an LLC immediately post-closing via quit claim deed.

On the other hand, this phrase is often used by the likes of Uncle G (who, having an accounting degree, should really know better) to suggest claiming personal expenses as business deductions.

Any suggestions you have in that regard would be greatly appreciated. 

Some quick googling suggests the answer is yes provided I don't rent it out more than 180 days for the first year, do I understand correctly?

I ain’t no lawyer (except on the Internet), so will possibly have to resort to checking with the lender (BoA) to confirm as I didn’t see anything in the contract that suggested that it closes if I’m no longer resident.James

Our agent is not an expert on this type of deal but suggested a short loan term of 3 or 4 years and a balloon payment and written up by a lawyer. 

I would suggest leasing a commercial space for your business first before you go straight to purchasing a space.