She said she doesn't recommend a doula for everyone, but she thinks it would help me get through the "mini transition" from early labor to active labor. Last time, I ended up begging for an epidural around 3 - 4 cm (sad, huh...)[/QUOTE]

s hey, that switch from early labor to active labor is a big deal, in my opinion, as big a deal as the switch to transition later on. Labor is shifting gears, and it takes a little bit for a mama to catch up to that change sometimes.
I served as doula to a first-time homebirthing mom whose mw also suggested she get a doula. This mama was amazing; the suggestion wasn't for lack of confidence or need for support...the couple was taking homebirth Bradley classes even!
But it was a godsend that I was there w/ the couple...labor was very long, there was an unanticipated transfer to the hospital (dehydration and exhaustion.) It was also at this birth that I learned a doula really really does have a job to do, even at a homebirth, even with a midwife and midwife apprentice team: the midwives are there for mom's health and baby, and the doula is there to support mom and the partner.
It was interesting, for me to learn the dance, and to appriciate each member of the birth team's different roles, and how we all worked together to support this mom and partner, but how we each had a different role......and heaven knows hb mws are touchy-feely and with the birthing mama more than some hospital mws, but still--a doula can be a fantastic asset to the birth team.
There are doulas that would practically pay
you to be invited to a homebirth. If $ is an issue, I am sure you could find someone who would offer services for a reduced fee, just because it's a homebirth. Personally, I love to support homebirthing women--I don't have to play defense, and keep interventions or interruptions from spoiling a woman's labor;
all I have to do is be supportive.