Think small, low level magic jobs:
Sorcererous Cleaner - uses Prestidigitation to clean the expensive clothes of the wealthy who are afraid they will get damaged through ordinary means. Also repairs clothing with Mending.
Arcane Translator - with a few Comprehend Languages prepared, maybe a scroll for Tongues, and an apartmenr near a busy market place where he serves as a translator for high level deals that can afford his services. He could supplement his income with a dayly lock box service in which customers can place items in secrued boxes with aracne locks and alarm on them while they are in town for the day.
Fight promoter - a pit and unintelligent summoned monsters, house takes a percentage of the bets.
Fire brigade mage - A wand of energy resistance and mage armor for the noble's quarter fire brigade. Summon a few water elementals too.
Entertainer - there are pleanty of low level spells that, with some ranks in perform, can be used to wow audiences. Especially as a Bard who has the skills or a Sorcerer who can cast them over and over.
And thats just from a quick look at the lower level spells. Also consider detectives, spies, messangers, and other mundane tasks that would have an edge with a bit of magic.