Relocating the snake within his own home range will do little to curtail his jaunts around your property, in all probability. Rattlesnakes are very well know to use the exact same refugia within their home range from year to year, and I definitely believe that you're seeing the same snake over and over again. Also, if you release the snake outside of its home range, it will likely die. Rattlesnakes seem to be very set in their ways, and don't typically take to extended relocations very well. Consider those points before you decide what to do. Also, I don't see how Mojaves are any more difficult to get feeding than any other typical crotalid, provided you give the snake proper husbandry conditions!