You'd be best off searching the Rotorheads forum for the answer to this! If you are thinking of going to HAI (and there are disadvantages - again, search the forums), then contact them for quotes.
Where you want to train can also depend on where you want to work! You need to look at the employment prospects as well.
Your question is too open and too global for anyone to answer it simply!
In the UK, the minima are 45 hours PPL, then 110 hours hour building (which will include your night rating), 30 hours CPL, then hour building for another 65 hours for the instructor course and then the FI course which is 35 hours (IIRC). If you do this on a Robinson at, say £210 per hour (rough/ruff UK average) it will total £60k. Then there are various fees and exams costs plus ground school.
Cheers
Whirls
Going to have a lie down as I've just scared myself with those figures!