Budget doesn't exist in this hobby: Brian's 45g Build

[WarDog]

Lots of members here build their own stands. Just scroll through the Tank Journal forum. You can spend as little as nothing, if you have material lying around, or hundreds to thousands depending on many factors including welded metal frames, or fancy millwork. In your case, I'd expect you would spend $60 at least on materials at Home Depot etc. Buying a used piece of furnature and reinforcing it as Myka suggested is the best way when on a budget.