Yes
No, South Dakota will honor Iowa's ruling. They will not allow you to obtain a license before you could get one in the original state.
No.
Short answer, none.
Yes
If your license is suspended in Iowa, you would not be able to obtain a license in any other state until the suspension is resolved. Each state has its own laws and regulations regarding license suspensions, so it's important to address the suspension in Iowa first before applying for a license in another state.
You get arrested if you get caught possessing marijuana in any state of the U.S. Whether you lose your drivers license or not depends on your penalty, and usually your drivers license isn't affected by an arrest.
Not until the suspension period is over.
The rule is that you cannot drive a vehcile on a public highway anywhere if your license is suspended by any state.
60 days
60 days
60 days
Yes, if the infraction happened inside the state lines. however, they won't suspend the license themselves, but will request Ohio to suspend it.