Several years back, I read an article about how people are so attached to their things, that even if they don't have enough room in their house, they will continue to pay to store them off-site. 

While can start with freebie, online people locator sites, they have their limits.The bigger questions should be related to deciding which properties represent the best opportunities for profit and the sweet spot for prioritizing fat deals.

Remember pigs get fat and hogs get slaughtered.  

I saw something similar at a flooring store locally, but it was much more expensive.  

Should I just store up capital right now, take the interest deduction from my second home and wait to have rental income?

Can find it at most health food stores.

They are better than any book you can buy in the store.  

@Brandon Turner...I was vying for a fat commission check and you went and blew it...I'm tellin' @Joshua Dorkin...

Another cost effective route would be to buy from a used appliance store near you.

Great Stuff (sold in hardware stores) is good for a lot of the sealing.