Mexican Travel to Germany

I have some questions as Mexicans dont need visa for Germany.

I plan to make a trip of only two weeks to Germany.

Will, they are questioned at the airport/Immigration?

such as Where is He/She staying/Hotel Booking?

How much money you have?

How much money should I have in my account/Cash to declare immigration?

And if I have a letter of invitation from a person in Germany, how much money should I show to immigration?

Or at the airport, nobody will ask anything about these things?

Thanks