Bingo!!
J is not the kind of guy that is going to walk anywhere!! He's used to driving or using his friends as taxicabs. He has that upper class mentality that they have going on down there.
Yes... walking home would have been Joran's last resort. I believe that he would even call the brothers in the middle of the night to ask them for a ride home before he would hoof it on foot. The brothers probably told him no or or they let him down gently and told to try and find another way home and if you can't find a ride home from someone else then call us back. The text messages was to let the brother know he made it home after calling them for a ride home.