More things you need to think about...
1. Do you have a location to operate it?
2. Do you have a vehicle/trailer to transport it?
3. Do you have sufficient lifting equipment to lift it? Do you have a means to repair/reinstall a throw/broken track?
4. Do you have means to pull the powerpack out of the hull if need be?
5. Do you have a welder (type would be determined by the type of work)?
6. Do you have a cutting torch, drill press, grinders, drills (a mag drill, even I don't have one but I've decided I WILL get one soon), cut off saw, and other metalworking tools?
7. Do you have a lathe and mill or at least someone that can build parts for you?
8. What kind of electrical experience do you have? Do you have a multimeter and other basic electrical gear?
9. Do you have a Tractor Supply/Home Depot/Lowes/Auto Parts store/Semi Parts store/Equipment sales-repairs nearby? (I speak from experence, you WILL visit these places frequently, to the point they know you by name and card number!)
10. Have you done any smaller project where you're not building a vehicle from scratch, but something that requires some fab work? (Engine conversions, drivetrain swaps, exc.)
Just trying to give you a few things that are abstract from your topic, but very much related from my experiences.