Depending on the time of year you are moving, the rates will vary. Summer time is more expensive, you will get a better deal in Winter.
Try calling around and get quotes from moving companies, it may be comparible to the rental truck. You can also look into UPack or PODs, a portable storage container that you would load yourself and they can deliver to directly to your home?
If you are looking just for help to load your truck or storage container Elite Moving Labor or Moving Staffers has nationwide Professional Labor that can assist.
Good Luck on your move and enjoy Sunny Southern California!