I went with something a bit smaller & simpler: a
Todd Diesel Caddy. It has a rated capacity of 28 gallons, but they typically hold near 30. Loading it is usually easy enough, as it is empty. However, I have loaded near fully caddies in the back of a stepvan, so somewhat high, by "tailgating" it up and in. I unload them the same way. I'm 63. Ramps would help, but I still don't have an issue with unloading a full caddy by tailgating.
I went with this when we had a second home which was primarily for a job my bride had taken. We had a 1025R at each home. I still had my business in the town in which our primary home was located. As such, she often had to mow grass and blow snow on her own. She never paid attention to the fuel gauge and would routinely run the tractor out of fuel while mowing. Having her attempt to refuel with a 5 gallon container was a formula for disaster. The weight was difficult for her to handle, which meant she spilled a lot or would drop the container. Of course, this would be in the lawn where she ran out of fuel. Nothing was going to grow where she spilled for years, unless all that contaminated soil was excavated and replaced. So the caddy was to prevent this. The diesel caddy with its pneumatic tires was easy enough for her to roll through the lawn, even when full. She could re-fuel the tractor without spilling. No batteries to deal with. Simple.
I have three of the same thing for gasoline without the pump. We utilize them for boats and the gravity feed works fine for jet skis. We have a fourth with a hand crank pump that is top mounted on the caddy. It was an earlier model that we purchased 20 years ago. It was a China junk pump and the seal for the crank shaft soon leaked profusely. The local parts store was able to cross it and I found I was not the only one who had this issue. We've had zero issues with the mid mount pump on the diesel caddy. The gas caddies we've had for nearly 20 years. It is to the point now where the rubber hoses are becoming stiff from age on some of them, requiring replacement. The diesel caddy we've had for about 5 years.
I purchased the diesel caddy from Zoro when they had one of their 25 or 30% promo codes and they also had free shipping. So it was less than $500 delivered, including tax..