Japji Sahib can be done anytime within 24 hours, but ideal time is before breakfast. Ardaas after is optional but if you can make it necessary will be ideal. When it comes to paat more the merrier.
Meat / alc should be in separate rooms to Gutke Sahibs. It is possible no matter how small the house. WAIT! Isn't all food in the kitchen??
You can still do paat after meat n alc. Nothing wrong there... just wash yer hands! (Obviously).
Yes it is okay, you can do that. just after you do your hair you can cover you head with a small scarf or chunni, then go on to further getting ready etc. i used to do this since i when i was in school, it is perfectly fine, as long as your motive is to remember god and do your nitnem and disrespect in any way.