4 Mages, 2 Priests, 4 Warlocks. The mages / 1 priest (the Zins) are 60 already and the locks and other priest are 21. I will take the locks to 60 then level them all from 60 - 70 - questing and grinding instances mostly.

The total cost was in the five figure range but I could have done it for significantly less. I would imagine the minimal cost outlay would be $10k USD, assuming minimal hardware outlays ($500 per machine) and assuming your time was free and not factoring in monthly fees (around $150/month). Doing it for much less would mean you would start to cut too many corners (in my opinion).

A bit of a tangent, would be interesting to see just how cheaply you could do this. Surplus 15/17" CRT monitors, DIY mounts, $300 computers... I would still imagine you would need $5k at bare minimum. Even then...

If something is worth doing then to me it is worth doing right. Since this is a hobby that I clearly enjoy a great deal, it behooves me to do it right