As an alternate to Davo's suggestion. If you don't like the lines, do some postprocessing. A careful acetone vapor bath or even just sanding and painting a piece after it's printed can absolutely make it consumer grade.

I think you've gotten yourself into the mindset that if you can't sell something directly out of your printer, then it's not worth the time. If you're asking for an affordable desktop 3D printer that makes money all by itself, then you'll be dissapointed. If you look at it as a tool among multiple tools in a craft, then yes it can be a very powerful tool for making you money.