you can just rent a u-haul for $35 or whatever the four times a year you need it
In Seattle, it costs $30 per large furniture item to make it go away using official methods. How much do you have? (And how does that compare to the price of buying and keeping a pickup truck?)
There's a couple of Honda (I think?) Kei trucks around me. 4WD, low bed, fold-down rails. I don't know about taking them on the highway with a load of furniture, but they're the most versatile-looking 'round-town vehicle I've ever seen.
I really wish we could have something like that, that's less than 25 years old.