I have one customer who orders 2100 bales and they are priced to be stacked in their barn. I have a young lady who has been a great help to me over the last 4-5 years. She more or less can run my operation. Where she is the most helpful is finding help. For some reason young guys are more then happy to go stack hay when she ask them. I pay them all well and she runs the stacking operation so that everything is stacked properly and no one is slacking. The barn is 8 miles from my field so they usually get a little break between wagons which I don't mind. The faster they unload the wagon the longer their break.
I had 5 kicker wagons but the only wood kicker wagon I had blew over in a wind storm and now it is a flat wagon
But we never used that one unless we really needed it. 4 wagons will work well and if you have good help you can get by with 3. I had my father baling while I shuttled wagons to the barn where we had 4 people (2 unloading, 2 stacking). I used the customers tractor to push the wagon to the back of their barn to unload and the stackers pushed it back out when it was empty and had it set so it was out of my way for the next wagon but in line for me to hook on and go out the drive.
This can work very smoothly if your baler doesn't break down and your help doesn't quit on you. One guy quits and the others are then short handed and wear out quick. So you need good equipment and good weather but most importantly good help.
And if you do leave your wagon for them to unload be prepared for a major headache. I let one of my customers take a wagon to unload early in the morning. They never brought it back to late at night. That was the only real problem I recall having. Most of my customers understand how this thing works and to keep the bales coming out of the baler I need my wagons back. I baled over 2500 bales one day (its all I had down at the time) and I only had to unload 140. The rest went to 3 different customers farms. I would have wagons going two directions at once, once one customers order was filled the wagons went to another customers. With everything working smoothly no one had to wait at all, as they showed up with the empty wagon there was a full one waiting for them (and this was the day the one guy stole my wagon for the whole day
)
Haying can be a lot of fun when everything is going right. But if one thing doesn't cooperate then you are in for some headaches.