You can always fight or compromise the 10% later with threats of litigation and a complaint to the State's Real Estate Commission.

But right now after all the fighting with them, they started doing a better job.

They can fight me in court if they like. 

Definitely don't want to have any drama and fights in front of my new potential tenants.

If they do charge, this could be considered an illegal fee, or at least something that the Apartment Association and REIA try and fight and prevent as an undue burden on rental owners and landlords.

People are wired to dig their heels in and fight.

The company can fight the taxes if they feel they are unfair (at least in my area you can), however I'm guessing the company purchased the house significantly under value, and the tax base is probably more in line with value then the purchase price.An honest question.

Parking a mobile tiny home on my lot also would violate codes if someone lives in it (had a friend get one shut down for this). the tl;dr is they are cool -  I'd love to see more of them if they are done right, but you'll be fighting a zoning and land use system that hasn't caught up.

If the market or purchasing power drop at all you may find yourself fighting to make a profit.  

Also, in my experience with this, I see lenders that will let you work for just a few months as long as it's full time, part time it needs to be around 2 years.Also, your credit and cash seems good, so that's probably a good sign and will help a lender try to fight your case.