New to dirt bikes, but not new to two wheels. Have had a street bike of some kind for over 10 years. Rode a dirt bike once or twice a very long time ago. Have some friends that ride and I want to get out there. I am 5' 9", 170 lbs. I don't want to buy new, and I don't want to buy a smaller bike just to want to trade up in 6 months. I will mainly be riding in the desert, sand, and trails out here in Vegas/Dumont etc.. I like working on my own bikes as well so I'm not looking to buy new. Leaning towards a 250, but honestly I don't know shit about mx yet.. Thanks in advance for the advice!