If you don't mind me asking, what was your total cost for supplies for this?
The freshwater stand was built 6-7 years ago and materials cost about $70 then. The saltwater is 6" wider and was built just a couple of months ago for about $110 in material. They each have a shelf inside that I didn't show. The end panels, doors, and inside bottom are made from panels of glued-up pine boards from Home Depot. I want to say that a 2' x 6' panel was around $30, and I used two of them. Front panels are 1" x 6" boards put together with glue and pocket screws. They are done in pine to match the rest of my living room. You might be able to do a little better on price with plywood. From start to finish I can do one of these in a weekend.