For me at least, medical is once every four years, BFR every two years and that's it. RAA is BFR every two years and annual membership. Not complaining at all, and I know we get stuff out of the membership, but it does work out cheaper for me to keep my GA license.
Depends on the aircraft hire thing, I can hire various GA aircraft for a reasonable price. It's not what you know, it's who you know in the aviation world. Ownership of a GA plane is more expensive though, mainly 'cause they're so old!! Unless it's an ultralight or something these new 100k RAA planes are no where near as cheap to hire as some think. I can hire a Cherokee 140 for $90 hr dry... or Warrior for $190 wet, G1000 Cessna for $210 wet etc... so really, like I said once you're there, it's not actually that bad compared to hiring a two seat high performance aircraft. Find flying buddies and it costs you even less!
Yes there are places out there that are a fortune to hire from, but shop around and get yourself out there!
Saying that I flew my plane for about an hour yesterday and only cost me about $15 in fuel!
Not keeping current is everywhere I'm afraid, and not just in the form of aviation!