I did a re-start after about 30 years off. I booked an instructor and
a 172 at Chicago Midway, and found that was a great way to learn the
system quickly, since the airspace rules have changed dramatically
since the 70s.

It only took about 10 hours of dual to get the basic skills back. A
PC-based simulator helps a lot with instrument scan, but don't try
landings - you develop bad habits (too much aileron, too little rudder)
on the PC unless you have rudder pedals.

If you're considering relocation, head somewhere that you can find
decent weather any time of year.