Hey Angela...
TRUST ME in-wall is the dream, unfortunately not possible now. I will however have a small room behind the tank for sump and equipment.
Wayne also has a stand and canopy with it. Hopefully in good shape and at most will require some trim and refinishing. If not, i am a DIYer and will build one ... i did for my current 125

Oh and Wayne's tank is already drilled with overflows.
Going 30" is something that i have given thought to, but i am concerned that adding yet more volume will require costly upgrades. Right now i am confident of the equipment that i have to run a 180 but any more i would have to rethink lighting, skimmer and flow. If you are interested here is a current breakdown of my 125 setup:
Lighting: 3 x 250 HQI, Pheonix 14K
Skimmer: DAS EX2
Flow: 2 Tunze 6100 on Neptune Aquasurf. Rocking a 1.5" wave! 2 MJ1200 mods, 2 Seios 850 just in case i need to point to any dead spots. Mag 9.5 return on a 3/4" Sea Swirl (might have to upgrade to something bigger)
Brains: Aquacontroller JR, DC8, Aquasurf
Dosing: Reeftech Kalk Reactor
RO/DI: 4 stage 100gpd
Chem filtering: 2 phosban reactors for GFO and GAC
Sump: 30 gal which i also use to grow chaeto ... will probably add a second sump for that.
What do you guys think?