With a totally stock car you should be prepared to spend at least 12k if you find deals on used stuff and do your own work. Every system needs beefing up to be reliable. You may be better off finding a car that's already modded.
I would be surprised if a stock drivetrain ( internals) could hold together for long at 11 seconds
I'm working hard to run clean sub 14's with largely stock car and the dollars add up
You mention you forgot how slow a stock car is. How quick was your prior turbo Buick and what did you put into it with regards to mods?
I agree with pronto if I had any intentions on consistently going into the 10's I would either purchase an already built car with pedigree or a hellcat.