How much do you think this tattoo would cost?

It all depends on where you go, how big, what colour, etc. I suggest you talk to friends about some good tattoo shops (you do not want to risk getting a nasty infection from a dirty needle or have a crap job done on your body) and then read reviews online and then what you can do is pop in and meet with someone there explaining to them what you want and how you want it. Every tattoo shop is different so it would be difficult for anyone here to tell you exactly, especially when we don't know the specifics. Good luck though :)