Thanks for the offer!
I will be looking into sump building options if I don't hear from Bill Wann over the weekend. Reached out again a few times this week with no response so far.
I have built many tanks, sumps and acrylic things over the years. Was planning on doing this one out of PVC (which I haven't worked with yet). If I end up building a large acrylic sump for this one I think the dimensions will be like 6'x6'x3'or 4'. That would be the best fit for the room if I go with an external skimmer. If I end up doing internal skimmers (if Bill Wann doesn't come through) then I will be going with 8'x4'x3'-4'.
Here is all you need for your sump and Skimmer body
Poly tank for your sump
Poly Tank for Skimmer Body