You did not mention if height of the dolly bed was an issue to get the TC through the garage door.
When I had to hide the TC in the garage from the HOA police, I took a trailer like you show, removed the axle and springs, and installed 8 inch casters to the frame. The 4 in back were fixed alignment (behind the removed axle) and two in front were swivel casters. This also lowered the deck to about 12 inches (the jacks barely cleared the floor). The short hitch was not a problem for truck clearance either front (hood) or back (tailgate).
I would reinstall the axle and use as a landscape trailer without removing the casters. I just renovated the trailer last year and removed the casters as we have moved and I am no longer a HOA scofflaw.
