He talks about many things like precious metals but focus on what a real asset is. 

My brother-in-law, a fire marshal, told me that even if the smoke detector is a melted lump of plastic and metal, they can easily determine if it was operational at the time of fire. 

Are concrete footers the strips of concrete I see in mobile home parks sometimes that  are about 2 feet wide and 80 or 90 feet long... and the edge of the mobile home (the metal frame or chassis) is placed on the footer?

Banks typically lend based on secured assets, (owned real estate, precious metals, stock portfolios), etc.  

You'll typically see them partnered with traditional Self Storage - meaning those Facilities offering Storage Units for folks to store their household treasures AND on-site parking spaces for Boats, RV's, company trucks, etc. 

Depending on where you are you can change the facade with wood, metal, plants.

My AC guy showed me years ago to check the date the AC was built on the metal tag with the specs.

I've got a treasure trove of experience from my time in Dubai and have enjoyed great success.

Just North of Spring Hill in Holiday or in Crystal River you can get a better bang for your buck but it all depends on your comfort level.I am over in Pinellas County by Madeira Beach/Treasure Island and 4 units over here are about the same $650K to $800K depending on year built and closer to the beaches.

I would recommend reaching out to the county tax commissioner or treasurer for guidance on the tax sale guidelines as they may vary by county.