My tub QT set-up was $100.

Ranco Thermostat-69.99
1ft, 11 inch flexwatt-3.50
1 set of connectors for flexwatt- 5.00
S & H- 11.50

Tub - $3 (Target)

Edit:
15qt tub, kinda large for my hatchling but I was able to fit two small black hides and a water dish in there so it took up most of the room. Couple fake plants and she seemed happy. I'll post a pic or two after I get home. I'm happy with it. I plan on switching to a 6qt if necessary.