XE4 + 27mm WR would be my bet for a stealth street setup.
or
Any older ILC Fuji and the 23mm F2
Should be budget enough for a beginner for will still be a viable side-arm for a person who makes a living shooting pictures.
(I dont use "pro" to describe a person anymore as it has somewhat lost its meaning, even trying-hard, low class wannabe's are being tagged as pros nowadays.. apologies for the side rant)