Lending terms on properties owned in LLC tend to require more equity and higher interest.  

Part of the “problem” is that unqualified  syndicators tend to take money from anyone who meets minimal governmental requirements.  

As much as investors tend to complain about realtors, I'd strongly suggest that YOU need one since you sound very new to the game.

Without proper permits, there’s a chance the city may request you to revert any non-compliant additions (like the extra bathroom) to align with code standards.When it comes to refinancing, banks tend to look closely at the property’s legal compliance.

I tend to try to house hack 2+ units.

ya absolutely. most people just recommend multi family because it allows you to offset your income while living there without having roommates. also they tend to cash flow better so if the plan is to do this year over year making sure the rents cover your DTI when you move out is very important.

This tends to eliminate appraiser incompetence and requires adherence to guidelines set by the Appraisal Institute.  

I've noticed that the discounts tend to be pretty decent when compared to the actual cost of renovation (not flipping status, just better in general).3.

I tend to prefer this route.If you want to hop on a call and go over specifics I am available most of this week.

In terms of mid-term rentals, I find it's a little less $ than STR but, at least in my area, tends to be more steady and a little less work.