be at someone's beck and call(для кого-либо • The woman is always at her husband's beck and call – Эта женщина всегда на всё готова ради своего мужаTaras)
ten bucks says("ten bucks says" is a correct and usable phrase in written English. It is often used in casual or informal speech to express a prediction or certainty about something. • Ten bucks says the store will be closed by the time we get there.ludwig.guruAlexander Oshis)