He means a machine with approx 300 or 400mm working envelope and capable of cutting aluminium..

Rich wants to build from a plan but there's nothing directly suitable around (I've not found anything either) so he's looking at the option of CNC'ing an existing mill... but TBH Rich, on your proposed budget the sort of mills you could get will be pretty poor.... they'll need a lot of work to get them up to the standard needed...