Tractor attachments cost sooooo much money. For a lift like those wood bars, it would be about $300 or more in steel. My wood was FREE from Lowes or Tractor Supply and the carriage bolts, washer and nuts were less than $3.
I can toss a plank or two across the boards for a platform to haul tools or whatever as well. Or use it as a lift to stand on to trim trees.
I'm not a welder nor a machinist, but I try to be creative enough to save money. Hope others out there can glean from this too.