Jon.
It doesn't look straightforward because it isn't. You will get answers to some of your questions by doing a search on here, as most of them have been asked many, many times. But you will probably be just as confused at the end, because there are no straight answers.
However, despite the costs, do try to bear in mind that there are other more important factors to consider. A good school with good instructors will get you through in far less time, with far better training, than...some of the others.
It will probably even save you money in the long run. So don't just pick the apparently cheapest option.
Also bear in mind you're about to enter an industry where most of the jobs are dirty, exhausting, dangerous, not that well paid, and have no security. Being bored with your current job isn't enough. You've got to absolutely love helicopter flying for it to be worth it. Otherwise get a PPL(H), and maybe even more, but do it parttime to give you an interest, while retaining the ability to pay the bills.
Hope that helps a bit.