Voluntary Hajj is better than giving the money of Hajj in charity. But there may be cases where giving in charity is better than voluntary Hajj, such as if the money is spent on jihad, or da`wah or on needy people.

The time for stoning Jamrat al-`Aqabah is on the day of `Eid after the sun has risen and lasts until sunset on the day of `Eid. The stoning on the days of Tashriq starts from when the sun passes its zenith (i.e., when the time for Zuhr prayer begins) and ends at the end of the night.

Hajj is one of the pillars of Islam. Whoever denies Hajj or resents it after the proof has come to him is a disbeliever.

Your Sa`i between al-Safa and al-Marwah is valid, even if it was done without wudu because having wudu is not a condition of Sa`i.