I've been a Familyshare owner for 2 years. I own on the North Hill. We've been going to Smuggs for about 10 years now. I bought my unit as a resale. Make sure before you jump in that you check the resales on Smuggs.com. Smuggs doesn't list it's club weeks on its site, but it does list the wintershare, familyshare, equishare and full ownership resales available.
The familyshare units - Falcons, Trailside Highlands and Kestrels will cost less money upfront than an equishare. Actually, week for week, they will be less money too. The newer units have more amenities and space than the older units, which are still very nice. For example, my Kestrels unit has a screened in porch which the older Falcons doesn't have. But Owls has an extra half bath, a four season sunroom and granite counters. I looked at the equishares, but didn't need that much time, so I went with a Familyshare. As Sam said, don't expect a share condo to appreciate like a full ownership condo.
Advantages to North Hill are the North Hill Aquatics Center. The newest Owls buildings will also have special amenities which I'm not that familiar with. Disadvantages to North Hill are that it is not ski-in, ski-out like Falcons on the West Hill.
Like Sam, I have had very little luck in rentals of the off-season weeks. I have recently converted just the off-season weeks to points and plan to use them for airfares. The fixed weeks I kept as weeks so that I don't need to "reserve" my weeks with RCI every year.
I just called RCI a couple of days ago to investigate my first points transaction. Instead of giving a straight ticket for points transaction, they now give a certain discount for certain levels of points. For example, for 35000 points, I can get a $300 discount off a plane ticket. So, for a plane ticket that might cost $375, I would pay 35000 points, $75 ($375 minus the $300 discount) plus a $49 transaction fee, so a total of 35000 points plus $119. While many on TUG would not care for this deal for week that might yield them a discount on plane tickets less than the maintenance fees for their unit, I find that it is a good use of my weeks which weren't getting me anything before.
Before I owned a familyshare, we owned weeks at Smuggs. I have traded to Orange Lake in Orlando, Sheraton Vistana in Orlando, Hawaii a couple of times and Smuggs many times. Most of these transactions were with the Smuggs float weeks.
In general, any fixed weeks that you don't plan to use, I would rent out. Any float weeks that you don't plan to use or trade, I would convert to points.