Due to the lack of a suitable local bull I used AI for the first time a couple of months ago.
I went to see my vet who let me have a bottle of Genestran. The cattle were injected once and then again eleven days later (or was it 11, memory going, would need to check) to synchronise their seasons. If you are confident to inject your cattle then attendance from the vet should not be necessary. The AI lady was booked and she inseminated them. The cows are due to be pregnancy tested in about a month's time but from observation my guess is that 3 out of the 4 are pregnant.
Regards, Dave