STR allow campers to plug in without toilet for the weekend in beach community.

I've been doing major looking at Columbus and Clevenland Ohio, flew to Columbus a few months ago, recently found what I thought was some money-makers, but the numbers never pan out. i find that that even though the prices per unit are often around $50,000 and in Califrornia the price per unit is more than  $300,000 you will find that the profits in California are superior compared to Ohio. 

The listing has some weird provisions, such as: no toilet paper/paper towels/garbage bags are supplied. 3 night minimum stay (is this typical?).

It never really pans out.

Removing any items that make the property look dated like green toilets, blue sinks, pink tubs can help, updating all the light fixtures, removing old carpet to expose hardwood floors, removing wall paper and painting can all help with an appraisal. 

Anyone can collect rent and fix a toilet but getting familiar with your state and local landlord-tenant laws takes time. 

And yes I think distressed properties would be the best, mostly cosmetic nothing crazy. maybe I will invest some money in direct mail in pueblo while I look for a deal in Denver see which one pans out first. 

99% sure it's one of the following:Roof leaking into foundation seeping to the bottom of houseDownspout overflow or spillage seeping to bottom of houseSumppump back up or not workingAir compressor leak from HVAC unit if central airClogged sewer line (if toilets are having difficulty flushing)Water forming a reservoire outside due to unsloped ground (need to have a downslope from house to keep water flowing away from foundation)*Next door unit experiencing one of the above

But as you and @Michael Baum mentioned, the prices are high and finding a deal that pans out is tricky.

.- Cleaning fee kept by PM has about $20-40 profit depending on unit size and this profit covers all consumables for our starter packs (toilet paper, paper towels, soaps, etc) so the guest foots the bill not the owner.- Pet fees kept by PM that funds our damage waiver program.