Don't stop there, consult others...for a fee, that increases the income of Claude!

I am a fresher working in a service providing company which deals in proving service and solutions in marketing, promotions, consulting, digital enterprise, IT services, enterprise solution, corporate training, engineering and industrial services. 

He also can provide consultation for an extra fee if you need it. 

@Perri Kallergis if you still need a FL attorney to setup a business entity and related consultations PM me and would be happy to share my contact with you. 

You should consult with an agent or lawyer by the fact you are actually selling an option on your property $500 is way too little for the privilege and you need to get the buyers financial statements to even see if he is a possible buyer .On the surface it sounds like he is shopping your property around . 

There's no way anybody can accurately give you a figure without seeing the building, knowing the local code, and having a structural engineer do some type of consultation at the very least.

Do not exercise these remedies without consulting an attorney or carefully reviewing the procedures under the applicable sections.

Might be worth a consult with a lawyer.

You do, however, need to consult with a RE attorney in Indiana (though I do believe Indiana currently permits the SLLC structure). 

I have plans to consult my attorney, accountant and insurance agent, but would like any input from people with experience.