I have built a drift boat and mainly, I'd say it depends on what your goals are. You can see pics of the drifter that I built
in this thread.
If your goal is just to own a driftboat in order to go fishing, then just buy one and be done with it. You won't save enough money, if you save any at all, to make it worth the hundreds of hours that you'll spend building the boat. In the meantime, you'll have spent a lot of time building the boat when you could have been fishing.
Make sure your better half understands that by "saving" money (and it's doubtful you will actually save that much), you'll be spending hundreds of hours building the boat. And that means that her car will be sitting in the driveway when you take over the whole garage for a year to serve as your boatbuilding shed.
IMO, the best reason to build your own is because you enjoy both fishing and woodworking and you see it as a challenge. And believe me, building a boat IS a challenge and your woodworking skills WILL improve vastly. There's an old saying that you're not a furniture maker until you can build chairs, well I'd say anyone who's built boats is a lot closer to a master woodworker than than guy who hasn't. Almost ever single piece of a boat is built on a curve AND with multiple angles, tapers, or bevels. Nothing and I mean nothing is square and straight.
So I guess beyond the question of cost and time, is the question of skill. How good of a woodworker are you and how much do you enjoy it?
I had a great time building my boat and since driftboats are very, very rare in this part of the country, I enjoy having something that makes everyone stop and stare and telling them I built it myself. Also, by making design modifications, I was able to build it in a way that takes into account the local conditions I encounter because there are a lot of rivers where anyone with a heavy fiberglass drift boat will find themselves high and dry. It's a tremendous boat to fish out of and it gives me access to waters where only canoes can fish.
But building a boat is a labor of love, not a quick fix. My boat is very utilitarian by any wooden boat standard. Many wooden drift boats are really not boats at all, but works of fine cabinetry that happen to float.
Grouse