I will try and get you some measurements tomorrow. It holds 3.8 gallons so that is around 32 lbs of water plus the unit I would guess is around 8 to 10 lbs. so around 40 to 45 lbs total.
I have had good luck out of these from Sam's.
https://www.samsclub.com/sams/mm-hard-arm-chair-inclub-980018494/prod22121053.ip?xid=pdp_carousel_people-who-viewed-this-item-also-viewed_2