I would experiment with all-weather rear tire chains on your current LS J2023 before putzing around with someone else's used tractor.
Before buying chains you need to determine if there is chain clearance between tire and tractor. Usually there is.
LINK: tractor tire chains site:tractorbynet.com - Google Search
Here is your LS J2023: http://www.tractorbynet.com/forums/ls-tractor-owning-operating/267621-tire-chains.html
Kubota L 2501 Gear Drive. Great little machine, no need to worry of regen's, and will fit your implements perfectly.