If medical collections are hurting the score, I have let that slide; if it's a utility collection like phone or electric, that is a red flag for sure. 

I have multiple leads on turnkey spots, with most major renovations complete (roofing flooring, windows kitchen/baths & electrical and plumbing systems etc) that bring roughly 18-25% annual return, some w tenants in place.

The inspector should use a checklist covering appliances, locks, A/C, furnace, water heater, smoke detectors, electrical, plumbing, and lease violations.

My dad is an electrical contractor, so I've  been around the construction side of things my whole life and even been apart of a few house flips with my dad, so that makes me want to maybe start that way.

The data centers you mentioned will bring very little jobs and consume massive amounts of water and electricity.

Older buildings are at higher risk for issues with aging plumbing, electrical wiring, and the general wear of the structure.

MAINTENANCE AND REPAIRS: (a) Owner shall maintain (if necessary in Owner's sole discretion) the plumbing, heating, cooling, electrical systems, and also the exterior walls and roof of the Property for any repair that is greater than One-Hundred Dollars ($100.00).

RV conversion is not “plug and play.”Make sure you’ve double-checked zoning, utility hookups (water, sewer, electric for each pad), and demand. $700/site sounds reasonable if it’s a high-demand area, but if there are already parks nearby or seasonality hits harder than expected, that income stream could lag.

Do you have separate hot water heaters, furnaces, electric, gas, etc?

Dormered one side of the upstairs and added a full bath, new floors, HVAC (no AC originally), pool liner, landscaping, bathrooms, kitchen, flooring, roof, windows, siding, water heater, lighting, garage door, 200 amp service, moved electric service and everything else that went along with the above.