You should be fine as your 2015 income is just barely enough.Yes i will do my best to submit it 2 weeks before his birthday and yes we include her in our family size.
We are family of 3 + my mom + dad + brother + niece = 7
Based on our line 150 we made..
2015 : 83, 606
2016 : 114, 680
2017 : 88, 988 + 15,384 (Maternity EI)
Im just worried because my brother's passport is expired already and i dont have time to wait for his new passport and my dad's passport will expired next year during the process (if i get approve), is it okay if he doesnt have a valid passport right now? They will request for it if everything went okay, right?
As mentioned, the daughter of brother will still need to do a medical exam even if they are a non-accompanying dependent.
You must submit before the age lock-in date, so I would do even if on expired passport and include a note that you will send updated passports as soon as they are renewed.