It seems to me up here that most people foal their own foals at home. My vet is a breeding specialist and would never get any sleep during breeding season otherwise.
He told me that 99% of foalings go perfectly on a second delivery.
A green field is considered the best place for a horse to foal. My own were foaled outside in their paddock.
Just to scare you, someone I know had a mare kill her foal by rubbing it against a stall wall, so stalls are not the safest place. We do have a trouble lamp on a long cord if it had been necessary.
You should, however, try to be there for the delivery, and when the time comes close it may mean camping out there. I went to the bank one morning, no sign of the foal, 15 minutes later, there he was.
We rented a camera for one of ours…I stayed in the house because I was nursing a baby and was up a lot of the night anyway.
Things can go terribly wrong no matter what you do…no guarantees.
The vet should come to check the foal. Make sure all the meconium comes, as a breeder told me, because sometimes part can remain behind and cause blockage.
If the foal has ingested ammonium fluid it will need a/b’s, and therefore probiotics,
as ulcers can happen.