The concern with the DSCR loan is that I need to make the property present as though it's rented to individuals during appraisal (tough since it's a working rehab facility now) and must create another lease that shows the tenant as personal and not a company.

Personally, it's marginal at best for a house hack.

Office space is gutsy at this time with many companies working remotely, maybe part of your investment was to bet that people will be coming back to work in person.  

Completely agree and wouldn't normally purchase a rental in these markets personally.  

The person in the response above who got crushed by a $5000 repair never did have $100-200/mo. cashflow.

Like @John Underwood said, your cleaner and handy person can be of great help getting things done.

What are the rules for removing this person, as I understand it he falls under hotel rules, not the landlord tenant act.

Instead of debates and personal opinion, look for proof https://www.ladbs.org/docs/default-source/forms/plan-check-2017/single-family-dwelling-duplex-plan-review-list.pdf under G (Interior Env) which defines the minimum requirement of a habitable room (aka bedroom or bathroom).

Also, would this loan help build my personal credit, or would it only report to business credit bureaus under my LLC?

I personally again in my opinion only.. but these guys could be fake lenders.. for sure HML  do not have a requirement that they can only lend to a corp..