2x4 and plywood tank stand?

[Johnny Reefer]

Not much. Not sure how much wood you'll need. I leave that to you to calculate. I'll be building a wood stand for a 180g soon 72" x 24" x 36"H.
1 - 2x6 $3.19.
5 - 2x4 $1.69 ea.
5 sheets 3/4" ply $25.47 ea.
More than enough screws. $7.64
More than enough nails. $3.07
Wood glue. $2.98.
Total estimated ~ $175.
Savings on a prebuilt stand and the satisfaction of DIY...Priceless.

I've bought the hardware and glue, but still have to get the wood.
(Disclaimer. Lumber prices , lumber being a commodity, fluctuate. Above quotes are Home Depot from a few days ago).

I don't imagine yours would come anywhere near $100 as you wouldn't need near the amount of plywood I'll be using.

HTH,