Like all these kinds of situations, "it depends." Depends mainly on what your workload is and is expected to be with moving stuff, debris, materials, etc. The cheapest by far is the wide variety of "carry-all" frames sold these days. Mounts on your 3pt hitch and amounts to an angle iron frame with pre-made 3pt hitch connections. You can make your own wooden box or shape the load carrying container bolted to this frame to suit yourself. Cheap and universal. Depending on your financial resources there is nothing hardly on any tractor as useful and universal as a front end loader. If you spring for a FEL and add that to your GC1710 you can get one with a quick attach skid steer compatible connection mechanism and choose from hundreds of different buckets of sizes and shapes and features to suit you.
To me, carts are simply a nuisance. Maneuvering issues, take up space to park, etc. For what little I know of your situation -- on the cheap side go with a carry-all rear mounted and on the more expensive but huge useful side, go with a front end loader.