I was having the same kind of question. I have been toying with getting an FJ Cruiser, and a carrier like that, but I was worried about what bob393 mentions. How much weight the FJ Cruiser could handle. At the very least, I could haul my XR400 this way, but the R1150GS is probably out of the question.
I know they make haulers like this that fit two bikes too. Maybe I could handle my wife's XR100, and my XR400. I'll try to post any findings I come up with.
2000 BMW R1150GS, 2008 KTM 950R SE, 2001 Honda XR400R, 2003 Honda XR100R
Another Proud Small Scale Faker......
New England Pie-O-Rama