"most people think they can just let catfish eat whatever garbage is left over in the tank, not the case"
This might be the only useful info in this thread.
Now How in the heck are you going to keep a catfish, and a tiger muskie growing at the same pace?
Tiger muskie are a hybrid, displaying heterosis, which means they grow faster than either parent. Even with a commercial strain channel catfish, for instance, you will never match this growth rate.
If you buy a tiger muskie, it will be very difficult to find suitable tankmates.
You will need to keep larger non aggressive fish with the muskie.