Scratch the metal stand idea, I've decided on a 2x6 frame deck built into the wall with 1.5" steel legs. With the top of my stand resting at 40" I will have plenty of room below to access my sump and equipment.
I am currently waiting for my plumber's schedule to free up so he can do his part.
Updates to follow.
Bulk Reef may have diamond hole saws.
as much room as possible under the stand will save you many headaches
If possible, get a nice setup for top off and water changes. The easier and more efficient you can make maintenance, the more likely you are to do it, every time.
Start keeping records as well. It is nice to have a log book of all the stages of the build, water testing and new additions. Helps trouble shoot down the road.