Allmotor is going to run you a lot more money than putting together a turbo kit. But to me it would be more satisfying to run an 11 or 12 all motor than with F/I.

Turbo is the second cheapest hp gain. Still 1000-1500 for a nice setup.

Nitrous is easily the cheapest bang/buck. I secured a zex kit with ferrera valves for 650$.