I just "discovered" this show from Animal Planet! I've enjoyed watching them bring dreams to fruition in the form of custom-built treehouses all across the USA.
I'll never have a treehouse (and didn't have one when growing up), but I enjoy the creative process and the bringing of delight and happiness to many people; however, they have more to spend on treehouses than some people's main houses were worth! I mean, $129,000 for a treehouse?!?
Even so, it's great fun to watch and has gone on the top of my watch list for less-stressful TV watching (a good way to decompress after watching Hannibal, for example).
Have you see this show? Their website is
http://www.animalplanet.com/tv-shows/treehouse-masters/