VM, Welcome to the club.
Sounds like you have a good understanding of what you are getting in to. The price for the truck seems reasonable and I think the budget you have set will get you moving down the road. As others have said, tires and brakes are the most important. Fuel system would be next. I ended up making a gas tank for mine, but there are aftermarkets available if yours happens to rusty inside. You should expect about $200 per tire if you are shipping them in. A little less if you can find them locally.
Brakes are a little different. That is the one thing that held me up for about 2 years on driving mine. Mainly because I wanted to make reproducible parts. I was able to do just that and I have a kit available that uses off the shelf parts and is all bolt on. You should expect about $2500 with all the parts to get you driving.
Good luck on your quest and plenty of people here will lend a hand when you need it.
