You haven't mentioned how much sailing experience or
boat owning experience you have.
If you've never owned a
boat and are a relative sailing
novice, I'd either join a good club if one is local, or
buy a cheap smaller boat of a type that is common in your location.
Sail the heck out of it for a few years and buy the big boat once you know a lot more about the type of sailing you like and your
boating preferences. The
small boat will
save you a ton of money and you're more likely to buy the right boat.
Also have a look at the book
How NOT to Buy a Cruising Boat.