That is such a tough question. I'm assuming that none of the midwives you work with at the birth center will do a homebirth (I know that it's a conflict of interest due to liability sometimes) or know of someone closer who would? Or, would one of them possibly consider working in the role of a monitrice to be with you an monitor you during labor until the midwife can get there? Seeing you're in midwifery school and are working in a birth center, my guess is that you are hyper-aware of some of the concerns (such a negative word) to be looking out for during labor and might be able to prepare yourself for a UC if needed.
If it was me, I just wouldn't want to take the chance on the midwife not getting there (or drive for prenatals -- goodness, I don't want to drive 40 minutes for one midwife I've interviewed). But then again, I've only had 1 child, and not at home either. Your experience and training will probably serve you well for this pregnancy and birth. I wonder, seeing you're in training, if the homebirth mw would work with you to, especially later in the pregnancy when you have to be seen more, to let you do some of the prenatal exams on your own via telephone or something. And, if you continue working at the birth center, then you have instant access to knowledge if something is concerning for you.
OK, one final question & then I'll shush. Are you hoping to work at the birth center (or in that setting) when you're done at Frontier?? If so, it might be beneficial for you to experience a birth in a birth center. Although I know there is a lot of similarities between the two, there is something about experiencing riding in a car during 2nd stage labor to get to a birthing place that could help you relate to future patience. One of the reasons that I'm hoping for a homebirth is to avoid that drive, but also because I hope to focus my doula practice to homebirths & birth centers, and might consider midwifery in the future. I want to have a birth in both settings to help me relate to the families that I will be working with.
Phew. Sorry for the novel. Hope some of that info helps. I look forward to hearing what you choose.