But I may have made the mistake of buying the cheapo plastic ones. 

On those direct vented high efficiency systems, the air intake pipe can be blocked by trash flying around outdoors on a windy day; the air intake sucks outdoor air, and those plastic grocery bags flying around are ideal for blocking that air flow. 

Then, will encapsulate the crawlspace floor with plastic.    

You could possibly adhere the new man made plastic lumber directly to it.

Sometimes "Magic Eraser" works well on vinyl, plastic, and enamel where other cleansers fail.Consider that the next tenant will also put down a bath mat and cover it up... problem solved?! 

Properly sized breaker panel or fuse panel (yes, fuses are still OK).Plumbing: Are supply pipes non-galvanized (copper, plastic, poly)? 

Pelican makes durable plastic cases in all shapes and sizes.

I was able to get a case (96) of toilet paper for $27.  500 styro plates and 1000 plastic forks for $15.My tenants don't care about t.p. or disposable eating utensils. 

Tape down a few 1 foot squares of clear plastic and leave for a day or two. 

When the kids were home we would "hide" the plastic eggs with a little money inside, the hard to find eggs had more $$ in themWhatever your tradition, enjoy and have a safe one.