Then your spending money you don't need to. Yes you could do it that way but you have to buy a plug for each and then either have a multi thermostat or a power strip so you can plug them all into the same thermostat, not to mention all the cords you will have. I do agree it would work but it's not something I would personally do unless I had no other options. Easiest would be to wire them all now so you won't have to redo connections later. Plus you could monitor each level and work out the kinks before you start using the other levels, reason I say this is sometimes you get different temps on different levels so you will have to work out the problem or find a happy medium.
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