Have you seen the number of adverts for full and part-time instructors in either Flight, Pilot or Flyer? Flying schools are even advertising now, coming up to winter! With your experience I'd have thought that most schools would bite your arm off.
If you do a search on "instructor shortage" this seems to crop up in some threads and certainly there seems to be a forthcoming shortage as the 700hr route to a CPL winds down.
As to the part-time bit, I do 2 days a week as an FI(R)/AFI (mortgage means I can't afford to do it full-time) and I have recently changed schools and having put my details around, I've had more than one job to go to. I can't say what work is around in your neck of the woods but I've seen adverts within the past year for a Norwich-based flying school (I think
).
Not sure about the age related bits. Sorry. The only thing here would be your medical where I presume you would have to maintain a class one medical.
Hope this is of some use.
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Get there eventually
[This message has been edited by climbs like a dog (edited 27 September 1999).]