You can look at a mobile home and see it as an easy rental with new carpet, trim and some paint but there are other bigger uglier expenses that can come up.Roof Replacement, soft floors (water damage) in kitchens and bathrooms- most floors are particle board, exterior door replacement (special order), underbelly insulation falling, bad hot water tanks with rotten floor underneath (real joy), bad windows (water again), bad bloated siding (water), water damaged base frame around perimeter of home, cracked tubs (special orders) and frozen pipes (Good luck finding a plumber to come work on a mobile home- they do not exist). 

On the contrary, they usually have a very specific business model they stick to cause it shows the return they are looking for,  It's all about return. 

I agree with @John Warren I started in Chicago and expanded to Milwaukee cause the returns were better. 

First off they could close a sale and make a commission and secondly failing to do so could cause their license to be suspended or pay a fine. 3.

But, you can charge them back if the pest control report indicates they are the cause.

It will cause you to lose money every single time.

(Damage, but no injuries fortunately.) 

Increasing their rent 1 month after another is bad business practice and will cause a lot of issues.

Not worth the liability risk and the potential damage pools leave.

Like the others, inside mount if you can fit them.Look cleaner but they are also harder to damage.