TSC cages don't come close to the quality of KW cages, IMHO, but both are expensive compared to what I pay. I buy our cages from a local source; a guy who will custom build to order any size and configuration I can dream up, using 14 GAW. I have considered making our own, but when I start pricing wire and then look at the cost of tools I need to do it the way I want, it doesn't make sense cost-wise when I can buy from him.
What I *really* want is the Rabbitech system (
https://www.kwcages.com/cages/rabbit/rabbitech.html) from KW!! It seems expensive, but if you use the add-ons then divide the total cost by number of holes, it's really not that awful (yes, still more expensive than regular cages, but if it helps reduce the mess, it would be so worth it in my book!)