Regarding their products or any one elses, you should never use a product under a 3mm if you are concerned about appearance because sub 3mm thickness will telegraph unevenness in the subfloor on glue down; under a 4 mm on floating floors of the actual material not including the pad.

You know the old saying, If You Give a Mouse a Cookie he'll ask for a glass of milk . 

@Jason CrainI like the idea of making a little extra for providing the lawn care but I am not sure with the prices I have been getting quoted I could pad the cost that much.  

Understand rights of quiet enjoyment of possession, how and when you contact a tenant can quickly go to breach of their rights of quiet enjoyment, don't bug them, don't drop by with notices of mickey mouse inspection excuses to go inside, too much of that will cause problems.

Once bought then how to clean up such a park and convert POH to TOW (tenant owned) is the business model.The hard part (ignoring the huge problem of cleaning up such a park) is getting the seller to accept an offer calculated as:Number of paying pads x 12 x $equiv lot rent from surrounding parks x 0.5 (50% expense ratio) / 0.1 (or higher) for 10% cap rateAdd in nominal value of the homes, $3k for old homes on up a bit.  

Cat food is higher in protein than dog food; thus cat urine has a higher urea content; VERY difficult to get out of carpet/padding/floors.

Check out the book "Get Paid for Your Pad" by Jasper Ribbors.

Currently, it's a very manual process and doesn't do big spaces yet (that I know of), but if they get a camera that does something similar to the Google Maps shots then a realtor would walk through a house generating a bazillion pictures and munge it into a 3D house that a person could walk around in using a mouse/keyboard and controller.  

Has anyone used the portable self storage units rather than building a building on a cement pad. 

Carpets even when treated delicately only last a handful of years, even a moderate spill can do permanent damage to the padding underneath unless you pull it all up and dry it.I assume you mean in your garage you did that?