Yes, that will work ok. Originally, before I gained the ball joint coupling, I used a truck / pickup type tow hitch, a simple pair of horizontal plates on the bike with a drop-in hitch pin, gapped enough to allow for a little bike banking. After all, I wasn't going to imitate Moto GP aces when towing. This sort of thing but simpler:I also like the way your hitch connects to your bike. Sadly, without a lathe I can't make a suitable ball.
I'm certain there are better solutions than the badly depicted below, but this is what I can knock up in a hurry using what I have to hand - square steel bar, the sides made with 5mm thick steel flat bar I have kicking around, the middle with 10 or 15mm thick. Green bits are bolts through; orange thick washers. Both Homcom and Carry Freedom hitches should work ok with this, for 100kg cargo anyway. For 200kg, I'd need to make a stronger hitch and towing arm.
View attachment 55168
Car coupler for attaching a trailer and semi-trailer to a truck.
Car coupler for attaching a trailer and semi-trailer to a truck.
www.istockphoto.com
With the eye for the pin on the trailer: