I've had some decent regrowth in the hairline but the area was so shot it's never going to recover to what it was. However, some rare cases have been seen where minoxidil has been particulalry effective in the hairline.
I will message you a link to another forum showing an amazing reaction (I don't think I'm allowed to post external links to rival forums).
Just as a ball park figure, most HTs are around the GBP10,000 mark, but it depends on the amount of coverage and density you want. Going overseas you could expect to pay about GBP3000-8000 depending on whether it is a small or large session.
Financing is up to the individual to sort out, e.g. cash, credit card or bank loan!