Wanted: 100 Gallon or Larger

[Canadian Man]

I see me sump has given you some ideas!

Anyway
If you want to do it inexpensivly you could also link a few smaller tanks together with bulkheads and pvc.
I myself would much rather have some length to my sump if I did it again, more so the micro bubbles have less chance of making it through the sump if you change your flowrates or anything like that.