to be completely honest, from what i gather…your goals are not high. in my honest opinion you would be better off runing a 50shot of spray or a 75 shot of spray on the h22 as it sits. a budget setup is not the best idea for such a temperamental motor as the h22. the only way i would say go turbo is if you have rock solid plans to keep the car and build the motor later to up the boost. in which case a cheap turbo setup is going to be needed to be upgraded anyhow. and a cheap turbo kit will be harder to sell then a quality nitrous setup that would be cheaper for you anyway.
just my $.02