I am assuming you closed through escrow, used a standard real estate contract and met the deadlines described in those agreements.

A 1 bed room studio in a good area that is NOO STR eligible starts off at $600k. https://dlgoodmanproperties.id...In Davidson County a Short term rental is any rental agreement less than 30 days.

You would just sign a commission agreement with them and they get paid at closing. 

The cottage price is just low, that's all.In spite of that, it sounds like this is a normal agreement, I'll most likely go with it.  

Write them into your Purchase Agreement and get them under contract first.

You might be able to make an agreement with the person who is helping you purchase the property to check on it weekly/video calls with you and compensate them for going out.

She collects the rents, handles any tenant issues, deposits rents, does lease agreements, and handles our social media presence.

Of course your lease agreement and lease amount should reflect that in a way that it incentivizes them to take the deal... don't expect to get a good deal by charging them market/above-market rent if you *really* want the property. 

If you have a signed lease the owner has to respect the leasing agreement. 

@Mitch ConradThe other option is for them to do a participation agreement between each other.