I would just use the saline at this point and stop the bulb. The saline alone will help it move down his throat.
I would also start to wonder why he still has a runny/snotty nose at almost a year. Could be lots of things like teething, but I would have the doctor check him for allergies.
Also, there comes a time when they get to the stage that you have to hold them down to get what you need accomplished. Sometimes it's a two man job. But if he really needs it, you have to do it. You could also reward him afterwards with a treat or something, that would take some the pain away if he knew he would get something out of it afterwards. Kids are selfish (they have to be to survive, that's OK) if he's not getting something out of it for himself, he's not going to like it. Good LUCK