Not sure if your interested but a neighbor took a 55gal drum cut like a 1/3 or how ever much concrete you want and cut two holes in it to fit a old drawbar with category 1 pins in it and filled it with concrete over the drawbar works real well. I'm thinking about making one I just got a 6 ft tiller I can use for weight but that's ok till you get busy with FEL work and back up and bump something bad on tiller and what ever you hit the 55 gallon drums around here are common items to find for like 10 to 15 dollars I have no idea what a draw bar cost ok just a thought! The one in the pic looks good !
A nice low mounted receiver will make things a lot easier if you find that you are moving trailers or want to mount a winch. It should be as low as possible so you just lower, back under and lift the 3pth.