As far as mobile homes buyers dnt hV to pay a premium, usually so cost effective wnt matter as much.

The one idea we keep coming back to is removing the tub and installing a 4’x4’ walk-in shower area.

It was covered in ugly red brick looking sheet vinyl, a black adhesive tar from hell and we removed a wall.

The best way you could benefit them would be referring your leads that don't go the wholesale route to them, but to make this effective you may want to partner with a newer agent.

The split roll won't effect any residential real estate.

VRBO will remove fake posts if alerted to them, but they're not the most pro-active at policing them.VRBO can be a good source of tenants, make sure you have very good photos, as your photos can be the difference between someone renting from you and from the next property on the list.

The reason I am skeptical is would the same bank be hesitant to give an appraisal that would now remove PMI as it means less payment to them? 

But its likely you are simply overestimating the effect of an inquiry. 

Has it been removed?

How would you go about removing them once you have enough to purchase your own ?