I can only afford No Frills now, even Loblaws is a no-no unless I can get 50% off. There used to be more parking for visitors. They are already a very niche market so extending the hours might not be the solution. It's good that the city supports the stall holders but they are too expensive for me.
With respect to regular market vendors (and some perpetual farmer's market vendors); there is generally an opportunity to drop the price, especially with time and/or volume.
That may not bring things to a point where they are workable for you, but I just thought I'd offer that as an option.
My maternal grandmother, was, at one point very tight for cash as a divorcee at time when that was not widely accepted. She had a house, in a then not high-end area (the Beach); and took in boarders to make
ends meet.
As part of that, she went down to St. Lawrence Market regularly, and established a relationship {commercial, not romantic, LOL) with one of the butchers, and came to regularly buy a 1/2 a cow;
and whole chickens. To be clear, she didn't get these things in one piece, not even the chickens, they were butchered for her; but she bought that amount of product, vac-packed, and then froze most of it; some of it going into large
cooking projects like Chili or Bolognese.
At any rate, the end result was a price far cheaper than what a supermarket would charge.
If you have or can/would purchase a dedicated freezer, its an option worth considering.
She would do likewise with fresh veg that wasn't root veg, by buying in bulk and then treating as appropriate and freezing. Example, she bought corn in season, by the dozen ears; or more, then spent a day shaving it off the cob, boiling it for a few minutes, then spreading it to cool, bagging it in various portion sizes and freezing it.