Join Date: Jan 2009
Location: Alberta, Canada
First off, I don't know that much about breeding, so I'm sure you'll get much more information from some others that will post. However, I do know that the older a mare is (without being bred before) the harder it is for her and there are much more likely to be complications.
As far as the money, if you are going AI you will be spending lots of money, not only on the stud fee but on the AI being done. If there are any problems during the pregnancy you will have to have a vet out. If the mare has problems foaling there could be huge vet bills and they still might not be able to save the mare or foal.