Here's my 125 gallon tally, keep in mind it all includes freight to AK. I didn't include the electrician bill for the dedicated circuits...
Tank -- AGA 125 RR plus freight to AK -- $400
Stand -- free from a friend
Sump -- AGA Megaflow sump #4 -- $400
Plumbing -- AGA Megaflow kits (2), 5/8 flexible tubing -- $100
Lighting -- 432W SLS T5 array (had it left over from 75), new bulbs, Reef Optix 150W HQI pendant -- $900
Hood / Light Stand -- DIY, about $75
Skimmer -- Euroreef CS-180 / gate valve mod -- $675
Pumps-- Eheim 1262, Tunze 6060 streams (2) -- $400
Refugium -- AquaFuge HOB 25", Jebo lighting -- $200
Topoff -- Litermeter III, 44 gallon Brute -- $400
Other -- eggcrate covers, Tunze algae magnets, Salifert test kits, kalkwasser mix, 2 part additive, etc. -- $200
So, equipment total is around $3750 without livestock, and including LR and corals I already owned, somewhere around $1500 for that. Just over $5000 at this point, with about another $1000 worth of corals still left to be bought.