Good qstn. The phrasing does leave room for ambiguity, but "make revenue close to" certainly indicates meaning closer to "$X from old job ~= $Y from art-gig" >

Good qstn. The phrasing does leave room for ambiguity, but "make revenue close to" certainly indicates meaning closer to "$X from old job ~= $Y from art-gig" >>work something different and still make revenue close to what they earned on their job by selling art