Help this poor pup get the care it needs

This dog is owned by an elderly man, who doesn’t own a vehicle and doesn’t have the means to help his poor pup with the ginormous, most likely infected and painful growth on his knee that continues to get worse. i hate seeing this little one suffer as the weeks go by, it’s growing bigger and bigger and it’s turning black. I’d like to raise enough money to help cover the costs of the vet bill to help this man and his best friend.