You will probably hear from my husband, John as he's taking the lead in speaking with lenders.

If you have a lot of equity or if you bought the property when your credit score wasn't great (leading to a high interest rate), then it might make sense. 

If so how many deals were closed by the leads provided by the list?

According to the National Association of Realtors (NAR), as of 2023, housing inventory remains 40% below pre-pandemic levels, leading to heightened competition in many areas.To be considered a neutral market, not seller's or buyer's, the specific market center would need to have 6 months of inventory.

However Zillow and Furnish finder are simply going to give you a lead.

It’s simple.The real challenge lies in lead generation.Specifically, in generating motivated seller leads.To succeed, you need to focus on being found by motivated sellers.

I have a question about how often I should follow up with a warm/hot lead.

It appears to me this was a well thought out move that will lead to the Morris's having a nice  life here in Portugal and all the investors left in his wake are for the most part very much out of luck or any hope of collecting on judgements. 

Normally, the transfer of a loan from an individual to an LLC will lead to a due on sale clause. 

One that can send a message with the seller information included in the message (Seller Name, Property etc) There are many platforms such as REIreply , Batchleads, Launch Control , Smarter Contacts , Lead Sherpa etc.