Getting more power from any setup has its drawbacks in many ways. More hp through any means allmotor/turbo/sc/nitrous means more load on the rods/bearings/cylinder walls etc.
Why leap into things when you dont even have the basic knowledge of these kind of things? I have drowned alot of money when i didnt used to know stuff. If i knew things back then if i would had searched on the websites/i would had been alot further where i stand at the moment.
Search-search-search is all i can say.
And in the end. If your thinking/mentality is that "yaar turbo drinks alot of fuel or this stuff is too expensive" then i must say please enjoy stock cars!!
Not everyone has the patience/time/money/knowledge/resources to build a car in-terms of performance.