Here is my recommendation, before you buy anything, figure out what you want the vehicle to do. Then get a giant whiteboard and break it down into the functional groups; engine, transmission, axles, interior etc. then break those groups down into tasks and assign time segments. From 30 minutes, one hour, one day, one week, one month so that way when you have a spare few minutes instead of trying to figure out what you need to do, you can look at the board and say I have 35 minutes of time right now, let me knock off this task. It’s a great way to stay on target and not get overwhelmed by all the things that have to be done.