As you have probably gathered, no one way to skin a cat. Lol.
If you click on the boat equipment
list in my signature will give you some ballparks. The refurb
thread link will forewarn you about optimistic boat buying!
On the advice thing, I would say that the more you learn the more and better your questions will be to yourself (no one ever stops asking themselves questions!). In your shoes, I would be looking to crew for others, start inshore (SAR range - not all boats and skippers are created equal!!) before maybe trying a few delivery
trips. It's both about trying out different boat styles and understanding that skippers have mixed abilities no matter the experience. Same as crew!....but being prudent can get you a long way, without relying on luck. Plus you get hands on experience of seeing how problems are dealt with - and the dull stuff like watch keeping and cooking
. And maintanence.
It's all about increasing your chances of success (and having fun) before writing large cheques. And being married to own boat......not to say that it is not possible to write a cheque and "go now" (and come back!), enough do - but it's about the odds, especially on enjoying yourself.
Boats is all about choices, and living with your own choices - for some that is the key part of the attraction, for others a nightmare.