You should give them written notice of non-renewal within timeframes stated in the existing lease.

@Steve Babiak Perhaps I didn’t notice that the OP stated there was asbestos.

Well wouldn't you know it, The following weekend I had a job related BBQ which happened to be less than a quarter mile away from this "deal" As I drove by it, I noticed a realtor for sale sign and thought to myself, wow NWA can't actually be trying to wholesale listed properties?

I just had a lawyer and potential tenant come back with additional language that they could vacate after a 14 day notice with no penalty.

Notice I said...

I notice that the site Wayfair is being used on the HGTV show Brother vs Brother.

Since they are tenants at will now you will have to give them at least 30 days notice.

I noticed someone offer a contact for you here for someone who has plenty of experience with historical buildings, might be worth a shot.

I have noticed anyone and everyone in South Florida thinks they should get a real estate license; I would be a proponent of making it much more difficult to et a license, maybe resulting in individuals getting a license as a career choice, not a weekend whim.

As always, check with an attorney for your specific needs and make sure the foreclosure process is performed with all services and notices property performed and documented in the special proceedings file... per the process defined in your state's laws.