We are paying $570 for ours this August. He is a sought after celebrant on the Sunshine Coast. He is doing all our legals, NOIM and marriage cert etc, we will have several ceremony planning meetings, going over things etc. He provides his own discrete microphone and amplifier, does a practice the week of, if we feel like it, and organises everyone on the day and gives them a run through of what is going to happen. He also does the entry/exit music if you want, but we have hired a DJ to do everything sound related on the day.
39 is not too young at all! I think that is a great age, young enough not to seem like an oldie but also not too young to think that you have no idea.

I've heard it is hard work though, and takes alot of experience to build up a good client base and be sought after. Maybe you could find a good, highly sought after celebrant in your area and offer to be a free assistant one day a week or something? Just to get some exposure as to what it really involves.

I think go for it! What a lovely career option, you get to be involved in what is one of lifes biggest moments for these people, so full of joy and happiness..... who wouldnt like that feeling