Thanks to all of you guys.
Well i had short chat with him about general things, but i will meet him soon to talk about the project and visit the lab.
Is it ok to mention my concern about this issue to him in the meeting? but i do not know how to phrase it in a way that it wont be rude lol.
About the fees, my father will pay my tuition fees, and i should manage the living costs with my wife.
getting PhD degree is a dream i always had, plus it will open a good career chances in the energy industry.