Can't argue with only $50 a sump runs about that before the pump if you make it elaborate. Although all you need are filter socks a 10g and some lava rock for a good sump lol.
Im about there without the pump for the one im building. (20g sump for 60g tank)
Only other thing that I can think of as a plus for a sump is that the can be adaptable to whatever sized tank you have/upgrade to. The 20g sump I'm building for my 60g tank may be a little overkill to some people. But if I do get a bigger tank, it should be able to handle propbably up to a 100g tank.
Friend - "You know thats not level right?"
Me- "Im a paramedic, not an engineer.... I'll make it work...."
"A foolish mistake on your end does not always constitute an emergency on my end" -unknown paramedic