If you don't want parts problems, and you intend to keep your boat for more than a half dozen years....don't buy an Epic. There will be problems finding replacements and service down the road, we just don't know how big the problem's gonna be.
It's a great boat, with a good design and good construction, but wakeboard boats have evolved a lot in three years. Of course, you can't touch many of the current boats for under $50K. On the other hand, a mainstream boat would be much easier to sell when the time comes.
Normally, anything with a Toyota logo on it is going to have great resale value, but these boats are getting hammered by the perception that in a few years they're going to be orphaned. It will get worse.
The engine is a work of art, but most of us wish it had a little bigger displacement (it's smaller than the Mercruiser V-6, although we've got almost a hundred more ponies.) Great efficiency in terms of fuel/power/weight.
If you're gonna tow your boat, you'll need to upgrade your truck too. We tow with a Sequoia (with cold-air intake and cat-back exhaust) and I wish we had more power in it. As it is, I've got to install air bags because of the mondo tongue weight and factor in 9.5 to 10 MPG on the way to the lake (expensive in SoCal). Your dad's Cruiser should be in about the same boat. Besides the weight, the boats trailer just awesome.
There is an outside chance that the collector value of the Toyotas will offset the service issue in terms of resale. But don't count on it. Fiscally, I think there are better alternatives out there if you're not intending to keep the boat for fifteen or twenty years.
I'd do it again, but I'm a Toyota freak.
