Typically it takes around three days, this could vary depending upon the size of your district and the extent of our involvement. You can however purchase as many hours as you would like normally in increment of 10 hours. There are certain times of the year that might make it easier, but you can convert at any given time of year. Ideally the beginning of your fiscal year is best.
Requisitions are actually more for distributed processing.
If you want the schools to enter the requisition and then be approved centrally that is a very good option and what we would recommend to larger districts.