Ideas for a sump...

[Mike-fish]

watch Kijiji for a 10g it seems that there's almost always one on there for next to nothing you might also find one on sale also for cheap. as for baffles a bit of acrylic should work great as stated previously check with a few of the plastics places in town to see if you can go scrap bin diving .

[RDNanoGuy]

Check your local petsmart. They frequently have bare tanks on sale. I picked a 20 long there for my mantis for $34.99