Perhaps a dedicated small ramp trailer that you never use for anything else. Something with short tires and a fixed fold down full width ramp. Attach a couple of correct length straps so they never leave the trailer by bolting or attaching with a clevis and tighten it up really well to discourage you or someone else from borrowing the straps. Drive on, toss a couple straps and away you go.
I had a JD Z225, sold it and did a significant upgrade to a Exmark Navigator. It is almost twice as fast and bags very nicely. So you could dedicate the JD to the rentals and leave it at a rental or on your trailer....and buy yourself a nice mower for your home.