Small Car question

My husband had to buy a new car and he bought his friends cheap 2000 MR2 Spyder. It is the tiniest convertible possible with barely enough room for humans much less my wheelchair and service dog. It doesn't even have a square inch behind the seats!

So we obviously can't ride in the car together and go anywhere. If we needed to switch cars (I have a big SUV) because he needed to carry something big I couldn't even take his little car because my wheelchair won't even fit in the passenger seat it is so small and my service dog would have nowhere to ride.

Oh, I have a TiLite ZRA if that helps...

So my husband was trying to think of a cheap way that I would be able to use his car. His thought was a bike rack on the back that 'maybe' my chair could somehow be strapped to. I have NO idea if this would work but if it somehow failed there would go 6 grand and my way of getting around in life.

I don't think we could afford to have a hitch put on and have some kind of attachment for my chair to sit on. We are super broke at this point with me out of work and all...

Does anyone have any kind of idea of how we could get the chair safely attached to his little car?

Thanks,
Chanda & Peregrine SDIT

Small Car question