i think i would probably look more at how he has acted in the 3 years that you have dated, with respect to the family interactions you have experienced, rather than hypothetical situations. i would certainly consider what he is saying in those hypothetical situations though. you don't sound unreasonable to me at all but then i am a westerner.

it might be good to talk to him about what he means about serving his mother so you are clear as to what that really entails. i think if you marry him just don't expect this to change. just go in knowing it is how he is. if he ended up changing then great but don't tell yourself that he will probably change to convince yourself to marry him.

from a western perspective his hypothetical behavior would be frowned upon, but i realize it is different in your culture as i know someone who dated an egyptian guy. is premarital counseling something that is available in egypt, either from a counselor or faith group? if it is, that might be good to look into. there might even be workbooks you could buy on premarital counseling.