Please help my toddler got staph/mrsa from the hospital?

My 3 year old fell from the couch and broke his arm.we were at the hospital for 3 days and they inserted 3 pins. 4 days later when i took him for his check up they took the splint out and looked at the pins and changed the dressing, the surgeon had gloves but the assistant who does the cast didnt. That same night at home my son had lots of fever and pain, i took him to the er the next morning and they confirmed he had infection but werent sure wich one. after 2 weeks of being here in the hospital with my son and 3 surgeries late to drain the infection they confirmed he has staph/mrsa infection. He has been on IV antibiotics and now want to insert some IV that is very long that inserts in the arm and goes all the way up thru the chest so he can go home and i can administer the antibiotics. I am very scared that this is a bad thing and dangerous!!! has anyone had success recovering from this infection????