Let's get this right out in the open: a PMD, on some level is essential to your indie film. Is he more essential than your cast and crew? No, but essential all the same.
It's a wonderful idea and a wonderful job description and I support it 100%.
But as a filmmaker working on a budget, here's my issues:
1. It's a little close to marketing. And with marketing comes sharks. And with sharks comes scams. We've all tried to look for jobs in the marketing venue and and quickly learned that almost all of it was bullshit. Or involved selling knives. It's just a breeding ground for opportunist assholes looking to make a quick buck. The scum of the earth.
2. That's not to say they're all scum. There's a litany of good people in the field, people like Sheri Candler and Tyler Weaver. There will be more as the idea gains ground.
3. But, since the role is so new, there's almost no way to know who is who yet. Look at it this way, when I hire a DP or an actor or a musician, I have reels and headshots and resumes to sort through. I can see almost everything they've ever done. I can talk to people they've worked with. I can do my research. And I don't have to find a wedding photographer who's pretty sure his skills can translate. I can find someone who has worked on a film somewhat similar to mine.
But PMDs are so new, that nothing like this exists. Everyone is new.
4. So there's no track record, yet the PMDs I've talked to so far seem to all require payment and seem unwilling to work for credit.
You can count on one the people in indie film who get paid without a track record. Why am I paying someone who's never successfully done this more than my experienced cast and crew? It's like if I had a football team and everyone got the league minimum then we brought in a kicker who's never played football before, but he's a world-class soccer player. Thing is, he wants $6M/year. I'd be an idiot to do that.
So I guess my message is this: fledgling PMDs, you're going to have to work for free and build up a resume, just like the rest of us. If that's a problem, maybe you should sell knives. I hear there's good money in that.