Possible Tenant doesn’t want to tell me business plan

[Robert Naucke Jr]

I have a commercial building sitting vacant on a MHP I just purchased. It used to be a laundromat, but has been closed for several years. The rear of the building is a 2 bedroom apartment. I was contacted today by a gentleman wanting to lease the laundromat building. He did not want to tell me what business he wanted to start, because he didn’t want me taking his idea for myself. Is this normal in the commercial industry? How do you protect your building from being used for something you would not approve of, or that would be frowned upon by neighboring businesses? Do I put something in the lease agreement that states I can back out if I don’t approve of the business?