Even though the tenant always pays rent, the smoking violations, pest issues caused by food waste, over-occupancy, and noise complaints are significant concerns.

I'm not concerned about his being able to make the payments and trust him to do so. 

This seems counter-intuitive as I doubt you’ll ever find a really good PM company but the headaches of managing any kind of a problem remotely overshadows the ongoing concern that a PM company is inefficient and expensive (at least it does for us).

Slip and falls are a leading liability concern a property owner should be aware of and snow removal is not something to cheap out on. 

One concern is the debate of whether a repair is needed due to renter user or deterioration of item over time.

Are there tenants looking for mobile homes to rent, and what are the going rates?

And yes, assessments do have me a little concerned with condos.

@Paul Bommarito, are you concerned with their financials?

Not going to lie, there are a lot of concerns I have in looking at GoodEgg's website and their track record.  

If the house has a septic system, especially if it's an older one, it's worth the investment to have a septic inspection done.This concern is particularly relevant for those planning to buy and hold the property rather than simply fix and sell it.