We did consider the cost of heating and upkeep for such a pool and pet, but we figured it would come back to us at resale time. Plus we saved a ton of money by doing most of the work ourselves and sourcing materials from salvage yards and Craigslist.
I don't want to spoil the reports of other projects, so I won't until we have our pics together. I'll just say there are some good entries to come!
*** Photoshopping and good idea credit goes to Stuart Ottenritter***