Man this is a complicated question lol, Dodd-Frank has restricted overall loan making by banks making it much more difficult for smaller businesses and new investors to secure favorably priced loans.

No legal advice given. 

They don't actually own the land or the improvements on the land, rather they just own the legal right to collect a fee from whoever owns the title deed. 

Example (Buy & Hold):Purchase price: € 150.000,00Downpayment: € 35.000,00Additional cost for buying: € 25.188,00 (legal, tax, agency fee, cleaning, mortgage fee)Renovation cost: € 10.000,00Monthly Mortgage Payment (PI): € 487,34 (annual interest € 2.267,28, annual principal € 3.581,91)Tax on income: flat 21%Total annual operating income: € 16.111,20Total annual operating expense: € 6.060,00Question:How do you calculate cash on cash return (ROI)? 

What makes you or your aunt think that a real estate agent is qualified to write up a legally binding contract that will properly protect her interests and comply with state laws?

Suggest you focus on very private person or restricted HOA(gated). 

Are sandwich lease options legal in Alabama?

(We can't legally deny her the right to operate it out of our property.) 

Saying something like that can get you in big legal trouble. 

Security deposit amountYou can find plenty of examples by searching for "tenant estoppel certificate doc" or exchange "doc" with "pdf" for more options.Here is an example and explanation: https://eforms.com/rental/estoppel-certificate/Some have a lot of legal jargon but this document does not need to be so detailed.