Yeah ... I never go out with all my panniers unless i am going to get something to fill them. (By the way, i never said I did, either.)
I would certainly get or build a trailer before i bought that thing.
I do not go out riding and come across some huge chunk of something and think, "If only i could get that home on my bike." I used to ... I used to collect construction scrap (built all my furniture from perfectly good lumber tossed because it was excess after a housing development or remodeling was complete.) I used to take home broken bikes. Now, i will just come back in my car ... but I haven't in a couple decades. Haven't had the need.
Others may have.
If you think this guy will eventually deliver, write him a check. Maybe your order will be the on which puts him over the edge of financial sustainability. Maybe the guy is waiting on You!
I only speak from my point of view. I do not intend to drown out all the other voices.