If I were you id wait till the PPS comes. Because Your visa will be issued on EU treaty practicing of EU citizen( your Husband).PPS is such a thing its a unique number tied up the to system.They can verify very easily with PPS number if the person paying tax or working..
Good that he is working just wait for his first pay slip as well his PPS number.
From my best knowledge.. Health insurance is not necessary
Here the leaflet says it all:
Link: http://www.inis.gov.ie/en/INIS/Form%20E ... eaflet.pdf
Anyways any short comings of the application they will ask you in writing..
so not to worry if you miss any documents