vacancy, repairs, capex, management, any shared utilities, any groundskeeping not done by the tenants, any permits or registration fees, etc. 

Have you considered bringing on a partner with experience in luxury flips.

Hey Elijah, Utilizing MLS access for comps is the most reliable method, but if it's not available, you can still utilize the parameters Jonathan mentioned on other platforms like Zillow, Propstream, and Batchleads.

While the bookkeeping will likely be complicated, is the accounting/taxation on this STR based on 100% STR income/expenses allocated 100% to business and general house expenses (mortgage, utilities, depreciation etc) pro rated between STR/personal residence based on sq footage?  

I split my house up into three units. One unit has nearly the full back yard and has a lot of water irrigation. The front yard is a common area for all three units and also has a lot of irrigation. How do I go about d...

However, if have several rentals and need to deposit checks, or use a debit card to pay utilities and other bills, etc. conventional business bank account would be the best choice. 

If the Multi-Fam does not have individual utility-meters for all units, then you have to figure out what to do or it can potentially eat away at your cash flow.  99% of Single Family homes do not have this problem.These are just a few pros and cons. 

I was on the HOA board of a luxury building in San Francisco and you would be surprised at how many people will let their dogs pop and pee in the common areas (killing very expensive plantings).

But many of our clients utilize our DSCR loans to purchase and re-finance long-term rentals (LTR) and we have to loan to an entity because it is a commercial loan per se, so that wouldn't be problem for us. 

Utilizing the same approach can can assist with for-sale housing as well where you can decrease DOM and move your inventory quicker, thus saving on carrying costs.