Depends on what you're hoping to achieve... I think the diversity of what you're proposing is a terrific idea and there's no reason why it wouldn't work if you're looking to cover costs plus additional income to supplement pension, rather than making a huge profit. There's definitely something to be said for working in a pleasing environment, surrounded by ever changing beautiful objects, coming into daily contact with like-minded, interested people and not necessarily making huge amounts of money. Payment comes in different guises.
I have to admit though it's a case of "I would say that, wouldn't I?" ;-) because it's a similar idea to what I'm working towards doing here - workshop/studio and gallery space which will include work from other people in the same way you're suggesting. Though I'm living 'over the shop' in a one-bed flat. I've a small income from something else, am old enough to draw private pension if I need, but prefer not for now. (state pension date keeps moving further forward each year it seems!!!!) so am looking more for quality of day to day life rather than making a fortune. This area is quite touristy and therefore winter's can feel long and quiet, but this is just factored in by the local 'commercants' and hours/holidays etc are seasonally adjusted/taken to suit.
Summer hours might for instance be 9h until 19h, staying open through lunch, seven days a week for the highest two months. Then in the winter it could be 10h-12h then 14h-18h Tuesday to Saturday - closing at lunchtime. Dependable regularity is what counts more than total hours, people are creatures of habit.
I do hope you manage to make it come about!
