So the things holding me back are the expense of going your suggested route. Just a return pump would cost the same as the Biomaster 850. Then I need a sump (another $400-500), a skimmer ($400-500), plumbing, etc. So $1200-1500 vs $450. Not to mention the price of an HOB, which isn't that much comparatively, or if I return this tank and get another one, that's who knows how much more.
I'm still not convinced a sump is less work, though. If they recommend cleaning the socks every 3-4 days and the sump/skimmer every few weeks, is this so different than cleaning the easy to clean prefilter once a week and then the main chamber once a month? I understand the expandability of a sump and that it can house more equipment, but the route I'm taking seems simpler to me.
I've been trying to get a hold of waterbox to see what I can do since I haven't even opened the tank packaging yet, just the stand. The stand is universal; it has the middle gap on top and in the back where the overflow pipes would go. If I can return the tank, then I may have to pay return shipping and whatever extra the saltwater version is. Then another $1500 for the extra equipment I'll need. Then lights, sand, rocks, testing equpiment, ro/di, containers... and I'll be broke with no money left for fish lol.