"Make the leap" .........I'm doing it by taking lots of baby steps in a row. I started out by scratch in 2004. Along the way I gradually learned about various crops, growing techniques, pests, diseases, etc. I'm still experiencing new pests and diseases, and new ways that crops can fail. Every year is a major learning
experience. But every year I'm getting better at it. I could now be self-sustaining foodwise if I had to be.
"Massive crop failure, and disease, as being the norm" .......... I've never experienced across the board crop failure (except for the time the goat and ram broke into the garden and ate it), but I've had plenty of individual crops fail. Right now this year I can't produce tomatoes, eggplants, peppers, okra, or cowpeas. This spring all the peas failed due to a disease I hadn't seen before. But other crops are doing better than I ever had grown before. So it all evens out as far as food production is concerned. When I first started out my success rate was low on the production scale but every year I'm getting better. I can now steadily produce scads of potatoes, sweet potatoes, beans, onions, and assorted greens without much effort.
"Large scale, or very small scale"........I always start out small then expand as I master the technique.
"Grow outdoors, or grow inside".......while I'd love to have massive greenhouses, I can't justify the expense. So my choice in my situation has been to learn how to grow outdoors. But I'm at the point where I'm seriously considering building a small but expandable
greenhouse in order to produce peppers and tomatoes.
"Poor results"......I see them as learning opportunities. Kind of like an outdoor, hands-on brain teaser to be figured out. I enjoy brain teasers.
"How long?" .........I started out growing a little bit of lots of different things. So I actually saw some small successes even the first year. Even for me it was hard to fail with radishes and beans. They weren't grand the first crop around, but it was so morale boosting to be eating my first homegrown foods.
When I started teaching
gardening to my friends, I quickly learned that everybody's situation was unique. Things could be different.......sun, rain, wind, soil fertility, the ability to gather resources,
compost making, veggie varieties that did well, pests, diseases, the amount of time devoted to
gardening, etc. So everybody's success rate was different. But to be successful, each gardener had to be willing not only to take their first baby steps, but be willing to keep learning and trying season after season. You can't be successful if you don't give it a go.