Add up the cost of all the typical bolt on's - especially headers, cams, etc. - and forced induction can be less expensive. Sure, there are lots of expensive blowers & turbos out there, but there are basic ones, as well, that are quite affordable.
I went with the most basic, non-intercooled supercharger out there (a
Vortech V2 S-trim). $3700 for the complete kit (including injectors, fuel pumps, tuner, blower, brackets, inlet/discharge tubes, surge valve, high flow air filter, etc.). $900 to install. $450 to dyno tune. Last week I ran a 12.57 @ 110+ in the 1/4 mile.
Staying N/A and running mid 12's is easy, but the cost is about the same as a basic blower. And a basic blower is easy to upgrade for much more power. You are very limited staying N/A.