What exactly does that mean?  

Discontinue contact....NOW.

I hate to assume the worst in people but I'm thinking it was cold feet again ... Posting this on the provider forum as well ... Hope he reads this and good luck finding a provider anytime soon Mr Coldfeet aka time waster.

Erratic behavior from a first time guy is possible as the apprehension of the unknown can be very high. This behavior if it's not his first time is a sign that you should reconsider seeing him at all. In ether case his lack of honesty is not good, you should be very careful.

he may just have difficulty taking the plunge.

Likely that he is a man that loves his wife but needs more intimacy/touch/passion than she is willing to provide.  

Your time is precious & your losing $$$. Patience & forgiveness is an awesome trait but this is you income.  

2 strikes and you're out in this case

Some guys with cold feet are really a warm heart.  If this person is truly contrite about messing up your schedule ask him to meet at a nice restaurant, (his treat) or send you flowers or a gift.  If he agrees then he is just a nervous newbie.  Ladies I have met tell me that kind of a guy can be a really great regular.  If you walk him through the first time he will be grateful and loyal.  You could be what he needs to find a little happiness in what could be a mouse like existence.  

on the specifics of what is motivating him is very likely completely fruitless.  what he is showing is ambivalence.  whatever he needs to do to resolve this for himself, i'm not sure that you can assist him with that.  if you look at stages of change, he might even be in the pre-contemplative stage, if what he is considering is a different way of getting his needs met.  IMO, you've given him a couple chances, and he's made it clear through his actions that he's not quite there yet.

You gave him a second chance which in my opinion shows how great a provider you are. I don't think you should feel bad at all for not scheduling with him again.

If you do your homework, read up on how this works, and be respectful, it is not that that hard. As a newbie, I can relate to the intimidation of this - I was (am to some degree still am) nervous. But I offered to buy a provider a drink and of course compensated her for her time and it all worked out to get started.

I can definitely see how someone could get so nervous they cancel.  But, if they got to meet you, they would be instantly at ease I think.... It's really too bad they have wasted your time.  Time = Money.

I would probably charge him a cancellation fee or make him leave a deposit somehow if he wants to see you again (though that can get complicated in itself.) Or better yet, just ignore his emails from now on, for sure. Once, somewhat understandable, but 2-3x? Not cool..

For your kind words and in helping to understand possibly his thought process ... I'm not angry; not a negative person at all but I was quite frustrated. I did give him the benefit of doubt and we are all human ... i have had to cancel before ... i did however let him reschedule twice ... He is just not there yet and may not ever be ... Who knows ... At least he didn ncns and gave at least many hours to a days notice in canceling.  

I'd say you have been more than patient enough with him.