Hi,
Keeping it within the budget suggests:
OM-2 or OM-2n which is overshadowed by the OM-1 etc or, cheaper still and giving manual and program modes the OM-10. They all take the superb Zuiko lens. With a bit of luck half the budget would cover it...
Minolta or Konica or Pentax P&S with a zoom lens (28 to 90 ish) as a pocket-able and not so serious camera but still capable of turning out gems.
FED 1 or 2 to use as a RF when needed and to pass as a more expensive one when necessary. (That seems to be an important issue.) And their standard 50mm lenses are more than OK.
Chose carefully and you could probably get a usable set of lenses for the SLR for very little cash. The 85/90 would be dearest but 28 or 35's are cheaper and many of us ignore 50mm standards.
And there it is; a line up of a serious SLR, a serious pocket P&S and a serious CRF, especially if the FED 2 is the chosen one.
Regards, David
PS I wanted a range of makers; the alternative would be a Pentax or Minolta SLR and 2 lenses (28 or 35 and 85 or 90), an Olympus XA2 or 3 and still a CRF if one of the fixed lens ones by (say) Canon or Ricoh was chosen.
PPS Stick to one make and Olympus could supply them all, too...