I did the baby monitor for my son Erich, and it worked quite well. LAter as he got older and was put on a ventilator we did have a night nurse, however I always had the intercom on even with the nurse.One night he was calling for me and I went down and the nurse was asleep in another room. That nurse never came back; ao even with a nurse it is good to have an intercom. I would also suggest a back up battery for the ventialor whenever your sons do become dependent on a ventilator.
I was so use to hearing his ventilator noise and the noise of his air mattress that after Erich passed away, I could not sleep without some sort of nosie on. I miss hte nosies so much now and would give any thing to have them back.