I was faced with the same problem when I bought my 28% edge, both of our vehicles are compact in size.
I bought a harbor frieght frame for $200, and built it like I wanted it, middle shelf slides out for 25% and smaller, and one 28 or 35% plane fits on the bottum. I built this for less than $500. My toyota or honda hardly know it's attached, even though it's tall. It's light (no sure of actual weight, I can move it around in my yard easily with one hand).