He is autistic & refuses to walk at times by dislocating his elbows. He weights almost 50lbs. He just broke the restraints on his newest stroller. (I got 6 months ago for $400) I need something extra sturdy that can not only handle his weight, but restrain him. Preferably something I can lift in & out of my trunk & not spend an hour taking appart.(umbrella type) Any suggestions???