there is so much more to consider, its not just a case of bolt on a turbo and off you go, to do it right to any sort of standard costs money. what ecu you are going to run, mega squirt, omex canems, me221, dyno tech, all are going to cost a fair few quid, the cheaper the ecu the more messing around will be involved to get it working to any decent standard my canems cost around £750 with wiring, plugs and sensors. then a further £400 on the dyno to get it mapped. your cooling will unlikely be able to cope with the extra heat from the extra bhp so another few hundred ££ for a decent rad, how good is your gearbox? a tired standard type 9 will soon give up with all the extra power and torque, is your diff and prop in good condition? are your brakes up to it? will you clutch take it, my uprated pinto clutch cost near £400
within a week of putting mine on the rd i had to upgrade the diff to a quaife atb slip to stop the car going sideways everytime i opened the throttle...
Not trying to put you off, but having just completed a supercharger conversion the cost was way more than 1st anticipated the resulting car is very very quick, the project was fun challenging and frustrating all in one so if you have time money and determination go for it just a lot of research 1st