I will return all the unused pieces and look for a non formaldehyde product tomorrow.BTW, the big box store says its fine and everyone uses it in mobile homes.

(local building departments may have tighter requirements.)

Commercial is not stuff so you can lock them out and than keep all of the items in the store for payment and breakage of lease.I bet if you change the locks and enforce the lease to the fullest extent of the law you might see a huge change in their attidudes

The last time I tackled anything like this, I called a few of the sod stores nearby and took bids having them compete for the business.

You can also store a list of properties you're interested in, your watch list, so you could develop your own system on a time line.Most MLS systems provide a lot of features and data on the public side, know the system and you might be surprised at what you can track.

I would confirm your plan with your agent and the housing department before you buy.  

I also think those "horror" rental stores will keep others away even if they are buying in the same time.

Wal-Mart, grocery stores around your target area, schools and all kinds of businesses, have them, even the hospitals.

When they mixed the paint color at the store, somebody could have botched the tints levels.

As you've already figured out, you can't comp a SFR to a duplex.If you want to get a better idea of value, start at the building department for the town and find out if they are legal bedrooms.