in recent readings on permaculture i really enjoyed seeing Sepp Holzer's methods of growing fruit trees as he doesn't do sprays, pruning or baby his trees. often to reforest an area he'll include in his seed mix (besides veggy seeds) seeds from stone fruits, apples, etc.
as an inexpensive way to get started with fruit trees in an area out back it was enough inspiration so that we're going to work on it (may take a few years to get going).
to get the fruit tree bugs and predators established i thought it would be also a good thing to start seedlings even if there aren't any sure hopes of getting edible fruits, perhaps most of them will be inedible or bait for deer. being persistent as i am will pay off eventually.
the problem is the whole area is clay and can be fairly wet at times. any seeds/trees will have to adapt to that.
if i can gradually get the whole back area converted to mixed fruit trees and the understory supporting plants over the course of the next 20-30 years that will be some fun.
having some grafting root stock to work with will be a side benefit. green apples can be a source of pectin. fruit woods are nice to work with for furniture or as a source of aromatic woods for grilling.
the questions are: from seeds, time to actual production for: apples, cherries, peaches, apricots and pears?
i would guess for most stone fruits three to five years. apples and pears, no idea at all...