@ $250/GBP, budget, you may be looking at lesser level components to get wheels and all ,
at least the rear will be a big chunk of it.

But if the broad ratio set cassette 8 speed will be getting you from place to place , fine..

frame has to be for a derailleur. that Rt dropout hanger .. threaded eyelet ..


NB you can even find 144 bcd current track, but old road size types. in 3/32"

But the teeth are thicker than what the rather thin 10~11 speed chains require
but 8 speed will be Fine..