If you want to do it on the cheap, don't go to Morzine/Les Gets.
Go to one of the hundreds of other resort towns; you will find lots of them cater very well for mountain bikers, and because they are not so 'popular', they have far cheaper lift prices, thousands less people and no stutter/braking bumps!
We spent a week in Valloire this year, after a week in La Clusaz and Morzine. Valloire had the best riding (XC and Downhill), the nicest atmosphere (so few English that we actually felt like we were in France!) and the cheapest lifts.
Want it cheaper? Don't follow the herd!
Oh, and drive down and camp, with as many people as possible in the car.
Dave