Xsbank makes a good point. If your planned use is one six-week shot of cruising a year, it can make a lot of sense to charter rather than own. Particularly if you're not going to be in the vicinity of the boat the rest of the time.
While a six week charter can cost a chunk of change, compared to the cost of buying a boat an the annual ownership cost-- moorage, insurance, fuel, maintenance, repairs, and upgrades-- chartering may cost less.
And even if it costs the same, the big advantage of a charter is that the boat's not yours. If something breaks, it's not your problem. Also, if one year you decide you'd rather go muck about in Europe for a month or two, the boat's not running up a bill even though you're not using it.
Obviously there are advantages to owning a boat or most of us on this forum wouldn't own one. But there's no one-size-fits-all solution.
Some of us, like my wife and I, own a boat but in terms of cruising it, don't come close to your six-week figure. In our case, perhaps one 2-week cruise a year plus as many weekend outings as we can get away with throughout the year given my work and travel schedule and what the weather permits.
But... we use the boat throughout the year even if we don't actually take it out. It's the equivelent of other people's weekend getaway cabin in the hills or by the ocean. It wouldn't be practical to do this if we lived any more than a couple hours' drive from the boat.