It will be a dramatic change from the East Coast that's for sure. The 29 Palms area is a fantastic area if you can appreciate the beauty of the desert. I have a link to a video that will give you an idea of the landscape and what to expect.
The area has a mix of homes that range in age, with some of the newer communities being as new as 2006 or currently developing. Swamp coolers are typical on the older properties but the newer properties generally have air conditioning standard. Some of the properties will have on site propane tanks rather than natural gas which is something that most people are not familiar with however there are local business that have programs to keep the tanks filled.
I do have properties in the area that might fit your needs and I am a Military Relocation Professional Feel free to contact me directly if I can be of any help in your search.
Exit Realty Blaine Associates
Joshua Tree/29 Palms - More than parks video
Everything is air conditioned, the humidity that you are used to to will be gone. The heat is dry and the winters are wonderful.