Courtesy of Wally S., Wally's Urban Market Garden, Saskatoon, SK
You don't need an expensive greenhouse to keep going through the winter. I use grow tables in my basement. Advantage: you don't need to pay to heat it. There is a small cost for lighting, but it's a fraction of what you can make from this type of setup. I can fit 16 trays per table.
This week Gail and I are ramping up indoor winter greens production. A chef's event coming up means I have to deal with 30 trays of micro greens. We will lay them out on the table and shelves, and cut before Nov. 8. We'll be doing a winter salad mix, which will be pea greens and a variety of micro greens. Pea greens might seem a little foreign to many people, but when you make them a part of a salad mix, then it is an easy sell. Micro greens are a luxury item at winter markets, and you can charge luxury prices.