You’re right about the plan being borderline stupid. Tahoes are a bit short wheelbase for highway speed and good control for more than a few hundred pounds out back. Just tell the guy to dig a little deeper and rent a vehicle big enough to haul dogs, etc.
“Just tell the guy “
You just told him.
Huh? I towed my golf cart on a two axle flatbed trailer with my new diesel Tahoe. Probably close to 3000 lbs. The only difference I could tell was the fuel mileage decreased significantly.