Hm? The "Quilt Market" is a giant trade show held in Houston every fall. It is NOT open to the general public, however. And I'm sure that's not what you meant.
Some of those questions are gonna be near impossible to answer. I don't sell my quilts, so I am gonna pass on most of those. I have been quilting since forever.. I grew up watching my grandmother quilt. Been sewing since I was 9. Random opinions, however, those I got plenty of, LOL.
Hand quilting IMO works better in a quilting frame of some type. You still have to baste the quilt like crazy first, whether it's hand or machine quilted. If I had to hand quilt something I would never finish. Top of the line hand quilters average around 12 stitches to the inch, but the # of stitches to the inch does not matter nearly as much as the evenness and consistency of the stitching over the entire quilt.
As for binding, it really depends on the type of quilt - are you making a baby quilt that is going to be washed a lot? (use a double folded over the edge binding, sewn down whatever way suits you) or are you making an art quilt that will hang on the wall and likely never be washed? (in which case anything goes - you could even have no binding at all..)
Selling quilts in general is not easy IMO because too many people do not want to pay a quilter a fair living wage.. You can bust your butt and make a gorgeous king size Lone Star quilt entirely hand pieced and hand quilted, then set it for sale for $500 (which IMO is the very least it should go for).. and then you get idiots who come along and look at it and go "Oh I can get one like that at Wal-mart for $40." and off they go, totally clueless.. and there's a LOT of those idiots out there. :p :p :p Never mind that one of those child labor made import quilts is likely to fall apart after washing it a half dozen times... :p
Another thing to consider is your costs.. you do NOT want to pay retail prices at Joann's for fabric if you are going to be making lots of quilts to sell. You will have to have an impossibly high markup to cover your costs. You do always want to use the best fabrics and threads and batting that you can get, which for most bed quilts means 100% quality cotton, which means quilt shop quality fabrics. There is a difference. Art quilts can be made of almost anything.. they are a whole different world unto themselves.
if you can't find anything helpful here on craftster, there's tons of quilting message boards and free patterns all over the web, lots of quilting magazines too.
Anyway, you asked.. hope it helps some. Happy quilting!