I want to deal with professionals, students and youngsters.

There's ways out there to best guestimate repair costs to get close as possible and there's also an option to have a contractor give me their professional estimate.

Though you should learn some basics so you're also not wasting money clearing a drain. 

It would be closer to existing water lines and drains for example.

A good real estate CPA will know how to manage the relationships between the various financial and legal professionals you work with.Best of luck!

We stopped at several open houses and had an opportunity to chat with real estate professionals there.

- remove existing tile - remove drywall in surround and window area to the ceiling - replace drywall with hardibacker redgard hardibacker large porcelain tiles (16x16, 12x24) with smallest grout spacing possible- highest quality caulk that is mildew-resistant - tile floors, 4" base/behind/beside toilet, in addition to tub surround all the way to ceiling - angle tiles away from block window - re-install shower curtain rod  - replace fan/light with higher-performance model with humidity sensor - inspect fan ventiliation to confirm vent going through ceiling - inspect bath, sink, toilet plumbing and waste drainpipes - add quarter turn water shut-off valve - replace bath fixtures to single stem handle - replace bath drain with grid drain

The needs of real estate investors are very different from the needs of "normal" insurance clients who just live in a house they own, and drive a few cars.PLEASE, for your sake and the local market as a whole, only work with insurance professionals who can demonstrate a deep and thorough understanding of your needs as a real estate investor. 

Our properties are completely renovated, have qualified tenants in place paying top market rents and are professionally managed by one our trusting partners.

This isn't something I would leave to Bigger Pockets forums the laws vary widely by state so it would probably be best to look up the law or talk to a professional in your area, (not over the internet) who knows what they are talking about.