Their construction team is a revolving door of drug addicts and illegals, who do bare minimum patch jobs and then they seek out poor renters who usually are low income with bad credit but are in situations where they need somewhere to move ASAP because they are getting evicted from their current living situation.

If you can train your tenants to change the filter every month, then more power to you........But in the vast majority of situations, that menial task is rarely done by most tenants.....kind of like having your dentist tell you to floss every day :) Some do it, but most wont...at least not on any regular basis for a sustained time.Must be different in CA....or my house...I change the filter every 6-12 months and its is barely dirty.

Both a and b are addressed by inspecting the unit. 

HOWEVER, that opens up a can of worms re: RVs as permanent residences - it's common that RVs are not permitted to be used as residences on bare land except under certain circumstances (such as during active construction of a primary residence); usually it's required that there's already a permanent structure on the property and the RV (or other small building) be considered an "accessory dwelling unit".  

So, to start with, even if i can make 2.5 k income, that will barely provide me livable income, i will be fine as i will also buy lot of time.

It’s mostly barely used or not used stuff that’s been returned.

I soon realized, which is what I hated, that nothing was ever written down, items were not addressed, and I could barely ever get a hold of them when stuff was going wrong.

I have seen it happen for instance when someone touches the steel case of an appliance that has a bare wire touching the case, in a grounded circuit the amperage would go to ground causing the breaker to trip.

I would never tell someone who’s barely paying their monthly bills to buy a property cashflow negative or break even.

I’m just barely getting to the point where I’m thinking of expanding elsewhere.