I used to build back in high school/college. Had a HPI Nitro RS4 and a Mini Pro. Spent close to a thousand on it. Nowadays with less time and other, more expensive hobbies, I was looking for something more casual but still a lot of fun. Ended up getting a Losi Mini Rally Car and Truck for me and my son. Lots of fun, and we built a big track in the back where these mini 1/24 cars can really stretch their legs. Something the 1/10th scale would find very small and tight. These things are light and pretty much indestructible compared to 1/10, so I don't mind if my son crashes!
http://www.losi.com/Products/Default...dID=LOSB0241T4
Radio included, just pick up some extra batteries and 2 sets of tires and off you go!!