It is not permissible to move the sexual organ using hands or any other means. It is permissible to view videos or pictures of the wife that cause sexual arousal.
If you migrated from this place and resided somewhere else then you offer shortened prayers when you visit it, unless you have not abandoned the place as your hometown.
If the salary payments are deposited in an account in a private or government bank, then it is subject to khums. This also applies to a transfer of the salary payments to an account in a private bank. If the salary payments are transferred into an account in a government bank, then it not considered owned until it is withdrawn physically and khums is not due before that. It is obligatory to pay khums at the end of the khums year from what remains after any expenses paid.