@G-BO you need to set your priorities, then back into building the setup you want.
Almost anything is possible.
Why don't you tell us how high you want your tank?
Is it a 30" tank? Do you want people to see it when standing up or sitting down- those are different setups.
The type of tank will determine how much maintenance in the tank is needed. Ie: reef, or FOWLR.
7' ceiling = 84"
Wouldn't go less than 16" inches, just to stick your head in and get an arm, or a piece of live rock in there.
That means 84-16 = 68"
If you tank is 30", 68-30 = 38" high stand.
NOW, keep in mind that's a suggested minimum, if you have specific requests, you should consider lower, or higher for that matter.