You can convert an electric into a nitro but your better off just getting a nitro.
If a stadium truck like the RC10 catches your interest, they do make it in a notro. The RC10GT is one of the most popular stadium trucks on the market.
Have you thought about getting a used RC? If you look around there are some great deals out there. You have to be careful because there are also just as many not so good deals as well.
Have you decided if you want to get a 2 wheel drive or a 4 wheel drive?
Stadium trucks are 2wd and most MTs (Monster Trucks) and Buggys are 4wd.