Believe me when I tell you that you do not have to be a carpenter in order to build a very nice rodent rack. Its actually much easier than you might think.
If your wife is going to be truly insistent on you getting something that is not homemade then you might want to consider getting a level from Freedom Breeder. You can always add on to it or just use it as a one level set up.
If you need plans on building a rodent rack just let me know. You can even get all the wood cut Home Depot. All you have to do is staple on the hardware cloth and screw it together. Very simple.

