In Florida, you cannot enforce an "agreement" to waive fundamental rights in the statute, and there are several.

Review their management agreement.

The lease agreement between my wife and LLC will have a clause saying subleasing is allowed and no permission will be required from landlord.

Tenant is obligated to fulfill the terms of the agreement.

Put the agreement in writing.

Does anyone have suggestions on lease agreement paperwork and how I can obtain one.

I've never come across such a vague lease agreement.

There are a few things you could offer to make the deal enticing to the seller, such as a balloon payment, but I would keep it to less than 10 years unless it is too good of a deal.You need a purchase and sale agreement with the terms and after under contract you will work with the title company to get a mortgage and promissory note drafted by an attorney to be signed at closing. 

I have found a tenant that has agreed to a relatively unconventional agreement for my furnished property in a popular vacation location.

I would bill the tenant for any charges incurred due to the lease agreement violation.