Thanks Jim, it seems that
kinda happened here...
...Our Kar Kaddy ss has surge brakes and so far it tows like a dream. Actually I've been looking at a used FJ as I always liked them however I'd have to get a drive shaft disconnect or trans oil pump if I tow it on the dolly. We have the 378 and I believe the towing capacity is 5000lb so I'm within spec with the FJ.
I also made a deal with my dad who has a 2007 Yaris with 40,000km's, I'll be taking it over when he stops driving, he's almost 85 and not driving so much any more. That little car will be perfect.