I don't see a reason to remove the new supports in the crawl space in the future and based on your picture, I don't think you would need to remove them to put in new floors.

Also, can any investors recommend a reputable property management firm? 

Quote from @V.G Jason: I'd partner with a lawyer that can help put some contractual language on the downside of working with contractors and real estate agents.I'd also partner with a RE brokerage firm that clearly understands your goals. 

Kay Properties has been an advisory firm in the DST space for some time.

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

Kitchen:Demo & Prep ($2,000):DIY cabinet removal, backsplash removal, and some demolition.Professional for disconnecting gas lines and major plumbing.Dumpster rental.Cabinets ($6,500):Option 1: Refacing existing cabinets.

Kohler firm?

At this point regardless of price point a cost segregation should be a full engineered study through a reputable firm. 

Clear office, Sheriff’s office, and law firm associated literally didn’t provide any information. 

Later I worked at general contracting firm did accounting takeoffs for a variety of jobs.