I might suggest separate bookkeeping to measure profitability.

It would hold it's own account and the bookkeeping would need to be orderly to ensure there isn't comingling of funds (don't use it as a personal checkbook...)

Sometimes people use the term CPA to generally cover anyone who works at a tax or bookkeeping firm, but many of these people just have high school degrees and no formal accounting schooling. 

My Wife and I have a Business Coaching & Bookkeeping business and we have a Hand Poured Candle Business as well!

Hi @Erik Belinfante I empathize with you, I swear the bookkeeping with STRs is never talked about, so much to keep up with.

My wife and I own a Business Coaching/Bookkeeping business and we just Bought a Candle Business here in Denver, Colorado in April with Seller Financing.

You also need some serious bookkeeping skills because you will be handling a lot of money for many different clients.

Add in dealing with OTAs, pricing SW, STR regulations, direct booking site, guests, neighbors, maids, handymen, contractors, photographer, bookkeeping, etc.  

In the case of the Series LLC you only need a single bank account because the Series LLC is established under a single EIN, but I only recommend this in the case of those who can follow the proper bookkeeping procedures.

If rent is $1500/unit and his portion of PITI is $1k ($2.5k PITI -$1.5k rent of other unit) that still leaves maintenance/cap ex (~$500, two units at $250), vacancy (~$150), pm (even if self managing include the cost because it is work - ~$150), misc (book keeping, office expense, asset protection (umbrella or LLC), etc - ~$100).Sum total is negative ~$400/month compared to renting.