Cool idea, but I do not think it requires casting away the maroon to an uncertain doom. I would pick up Joyce Wilkerson's Clownfishes
book, in it you will find that in her opinion maroons are probably the easiest to breed. Even with their aggression, if you add a very small one to the tank with a large (most likely female) one, the smaller one will immediately concede power due to the size difference and this will minimize aggression and quickly form a pair.
If your hubby is already complaining about tanks though, I don't see how getting rid of the maroon will alleviate any of this. In order to rear the fry, you will need tons of extra tanks to grow them out in (I assume you are going to try and put several pairs in the 75). In the grand scheme of things, I don't see how one other tank for the maroon(s) is really that big of a deal? In addition, if he is complaining about the tanks, he is likely to go bonkers over all of the culture stations you will need to provide enough food. My best advice would be that if he isn't into this endeavor 100%, I would rethink it entirely.