Try Cho Oyu, if you avoid crevasses/avalanches and react to your health state properly, it's the easiest one - base camp is at 5,700m, almost reachable by a car, then climb is "only" 2,500m. And there are only 5 higher peaks ;-)

I looked at the prices and man, even Cho Oyu seems expensive to climb. With permits and everything it looks like $30-40k.