How do you sell a mobile home park without having to carry the note, and for the highest possible price?

They carry a note while you fix and make payments then... when the property is ready to put on the market and once you sale then he will transfer title and you profit 

Few companies carry them, i.e. credit insurance, but I worked in one company that had it.

I'm sure one can get carried away if they aren't mindful of those expenses.  

Am I responsible for her stuff to be scrubbed?

now if you live in market and its your day job to manage your lower end rentals and you self manage or can assist the PM in real time.. it can work we see a lot of mom and pop landlords on this site that are successful or at least they say they are.. but the one's that are honest will tell you its not a bed of roses and these lower end rentals carry risk.. 

I don't use one as we have one STR, but I carry a ton of insurance.

I understand that it might be tough to sell a small park outright without me carrying the note, for example 10-20 lots.

One company owns everything and does nothing (this is your SLLC a/k/a “asset holding company”) and a completely separate company handles all of your operations (this is a traditional LLC a/k/a “operating company”) For the operating company which serves as your face to the world and through which you do all your business, you establish a Traditional LLC to carry out the operations of your investments.

Probably refi to include the current mortgage and give additional funds for carry costs until property is sold .