if the top isnt at least 3/4" thick admit to him that he was right and tell him to build ya one that looks just like it only put the below into use
If it is 3/4 in thick then do this to help the stand.
1. put a sealer/paint on top. most store bought stands like this have cheap stain on it.
2. put a 1/4" ac
plywood Painted/Stained on the back of the unit glue and nail the edges. this will stiffen it up
3. that center vertical shelf at the bottom (under the unit) put a spacer under that it will take some of the weight to the floor.
this mod could cost ya $30 and a few hours time
If you or your husband can get ahold of some tools or a friend with some that would help ya build it you could copy the basic design and build it with some good 3/4" plywood and a few hours then prep/paint time. the price for building a good one less than $150 painted. If you wanted to upgrade and go stain grade a little more.
Best of luck