Materials required for me to make:
Approximately one stack of the block of your choice
1-2 buckets of lava.
1-4 (possibly more if my experimental generator works) buckets of water.
At least 4 redstone (to be converted into obby)
Prices:
1000 gil for the basic generator (4x1x1 obsidian)
2000 gil for the deluxe generator (4x2x1 obby)
????? Gil for the ultimate generator (will update if/when successful prototype is complete)
Use a diamond power pick for maximum effectiveness.
Post here if you would like me to make one for ya. :3