We did this for the 4th grade. Moved every 3 months. My kindle was helpful for downloading free books from our home library. Lapbooks and science experiments were hard because you need extra supplies for those so we kept having to buy supplies we couldn't take home with us. Sonlight was nice because it was all scheduled and we knew how many of our books to bring. Math U See worked well, with our blocks. All About Spelling was hard because we didn't always have a good spot for our tiles and we only had a big dry erase board in 2 locations. Its a challenge for sure, but we went on TONS of cool touristy things as we covered American History (notgrass, I hated it) and finished with a trip to DC in the spring. Good luck to you! HTH.
Homeschooling mom of DD 10/01, DS 5/11, and expecting #3 June 2013.