To solve a similar problem as yours I decided that a trailer was the answer. My main concern was how much I would use it, I didn't want a $300 thing hanging out not being used. So, I bought a 70 buck TSO (trailer shaped object) off of eBarf. I used it far more than I had ever thought that I would, So, saved an eBarf search for "used BOB Yak" and got an email every time a new one was listed. It took a while, but I got one for $148 w/shipping. No difference with loads under 30 lbs. Major, and worth every penny difference, at 40+ lbs.

I don't have a concern about space but the Asom eBarf thing folds, with a quick release for the wheel, to slide under a bed or stand behind a door.

Mine could be had for not much more than shipping costs.