They can be quite expensive for sure. I'm into mine for over $30,000.00 cdn already and I can see another 8000 to 10000 being spent before I am done.
Now keep in mind that this is just for parts as i do most all of my own wrenching.
I have a mc express kit on a nytro and in over 1500 miles the only tinkering that I have done was dial the boost control up for more boost.
08 nytro $12,000
Mcx turbo $8000
diamond s sub frame $2,300
diamond s ti a arms $1250
Zbros exit shocks $1250.00
timber sled rear skid $1950.00
162" challenger extreme $ 750.00
br tech blue lexan hood $550.00
pingle tether $ 150.00
mcx display $1200.00
hallman boost control $165.00
mountain addiction rear rack and fuel cans $200.00
avid drivers 350.00
Clutching and clutch parts $ 500.00
Steering relocate kit from OFT $ 160.00
Avid 8 inch wheels $ 160.00
Cr racing 162" rails $550.00
cr racing steering post $350.00
cr racing 5" riser $100.00
Trail tank $ 450.00
These are Canadian prices the sad part is I still need a seat, tunnel, skis
and under tunnel dump . bigger turbo, piston and rods. Then ,just then, I might be done