They can be demilled to keep Uncle happy and still be drivable, but you need to have your own land to play on. Plan on buying diesel-often. You need 6 identical 6TN batteries, and they all should be replaced at the same time when they get elderly. Oil changes are 99% easier if you pull the entire power-pac (plan about a 30 gallon drum for the engine, plus about 19 gallons for the transmission) - the pac weighs 10,000 Lbs so your 5-ton wrecker will need the stiff-legs deployed. You will need a ground-guide if you move one near buildings, vehicles, or people - they have limited driver visibility.... If you decide to move one, plan on a heavy-hauler who normally hauls construction equipment, except he will have to re-license his trailer for a 110,000+ pound load. When it is loaded, you will have about 6" of track on the trailer, with the rest hanging in mid-air.
Lets face it, anyone who wants an M60 needs to have some spare bucks - LOTS of spare bucks.