The problem is the cost. Michelle and I still ave one of these on the dream list from when we saw one while buying our first Yaks. He used it to hay damp areas the farmers around him couldn't.. but he also feeds exclusively Hay to his herd..
You are looking at $8-10K just for the bailer , the rake/tedder is $2K or so, the mower (depending on kind) goes from 1-2K and then the tractor itself is 1500 - 4500 depending on size.
SO Yeah, a haying rig using this is on he order of $15-20K. And it really doesn't alleviate the need for a "real" tractor - you can't use this thing with forks or a bucket, and pull behind implements are tricky ( you end up straddling the PTO and trying to keep you body in the right position.. or you get the additional mounted seat... and then you also loose the power, weight and traction aspects-- so any digging, plowing, seeding etc is more difficult as the thing can only pull against so much earth..
Its an awesome little system for small acreage, but at that price point its no economical. Tat doesn't mean its bad. That solar PV system I put in wasn't economical either. .. but that was fro teotwawki planning. ... but all of this stuff is imported and come teotwawki , parts will be come difficult to obtain. UNlike a PV system - no moving parts, there are moving parts a plenty on this..
I wish we could find a way to hay ourselves - our pasture is already waist high, and we have to wait till the neighbor returns to get it hayed. But a standard bailer tends to need a 45HP or larger tractor, and these mini bailers are so expensive.. maybe someday