Fwiw, there is no such thing as an antique bailer. As far as I know, there’s never been ground-driven technology for them. They just didn’t exist before the advent of PTOs. They do make horse-drawn bailers now; they’re one of those quirky Amish technology workarounds, though. The bailer itself is horse drawn. The actual bailing machine itself is PTO driven. They work, but from what I have heard, you will need a few teams of horses to rotate through because pulling one tires them out quick – closest analogy is you trying to carry a large sheet of plywood from one side with a second person walking out of step with you on the other.
Better off doing what they did pre-bailers - namely putting up stacks of loose hay. I actually used to hand cut hay for our goats with a scythe & rake it into stacks piled on little frames in the field. Then, I just uncovered a new stack as they ate through the previous. However said upthread that farming on a small scale is impossible has obviously never witnessed what a petite American farm woman is capable of when she is sufficiently pissed about a bunch of shyster men trying to rip her off charging big bucks for crappy hay.
An ex-communicated Amishman from then mid-west taught me how to drive. They still put up hay in stacks, but up in their barn haylofts & not on stick platforms like I did. (Seriously. The place looked like something out of The Witch, between the goats & my very 17th century stick hay huts. To say nothing of the fact that I own a scythe, know how to use it, & much prefer it to a weedeater…) To put up hay the Amish way also requires more than one team of horses & several people. A few to rake up the loose hay & haul it in from the field. Then, it is stacked onto a platform hooked to a pulley operated by another team of horses & lifted into the loft. I’m hazy on how they then stack the hay in place. Either humans or maybe a pony team? At any rate, it is an incredible amount of work. Maybe start by using a horse or two to move round bales made by someone else & go from there.