I'm a portrait/wedding photographer, but I'm going to answer more on the portrait end of it all.
How many (average) days work is required in each of the below fields to make $600 profit per month?
This all really depends on the customers you get, and their needs. It also depends on the cost of the prints you pay from the lab. I have my own studio, and a great lab with terrific prices. I average between $75-$400 per sitting. I don't charge sitting fees because the area that I'm in is very lower-middle class and people just can't afford a lot of pictures on top of a sitting fee. I sell my prints between $5-$10 per sheet, only because I couldn't sleep at night if I charged more (no offense to anyone else, you just have to know my location to know that this works). I work 7 days a week, either at the studio or at home working on pictures, color enhancements, advertising... I do weddings also, but the studio itself makes about $2,000 a month on a slow month, senior portrait season is a good time for me. Of course I make much more doing weddings as well.
How much income (average) is made per job?
Like I said, on average I make anywhere between $75-$400 per sitting. It really depends on the customer and what they need. If you're photographing a single child, then Mom and Dad will get what they want, plus some extras for family. Depending on how many shots you take and how much you're selling prints for, you can get a decent profit on that. Now, if you're doing a family of maybe 2 or 3 generations, you have a better chance of selling more prints. You do the whole group, then break that down into smaller groups. You do the individual families, then all the grandkids together, then the kids together with grandma and grandpa... this will become a very long post if I go into all the different options there. But in this situation, you may have 2 or more families placing orders, so the profit potential is significantly greater than the sitting of that 1 child. Christmas is the best time for a portrait photographer, other than senior portrait season. Your sales will be much higher for family portraits during the holiday season, because you can upsell with cards, or deals on 4x6s for people to include in their Christmas cards.
A website is the best form of advertising. Almost everyone uses the internet. But when you're starting out, it's hard to get a body of work together to show off your skills. Make sure everyone you photograph signs a model release so you can legally use their image on your site and in other ads. Once you have the site, then you need to register with Google and Yahoo. You don't HAVE to use Adwords, just simply being on Yahoo! Local and Google Maps will bring enough business to start out. I don't advertise in the phonebook, or in the printed newspaper in my town. We have an online newspaper that has better advertising rates, and has more readers per day than the printed paper. I advertise with printed papers in other towns because their rates are better. I have an ad on the online newspaper's main page, and when we're offering specials or new products, I splurge on a bigger ad for a week or so. I also have some work hanging in local restaurants, and I pass out a business card to every cashier I run into. I leave brochures at all the other restaurants and I go to the reception halls in the area and leave brochures with them. They might not pass them out, but some employee might read it during a break, and give me a call somewhere down the road. The people you interact with may not need your services at that particular time, but they'll think of you later on should the need come up.
As a matter of fact, I went to the dentist when we first brought the studio to this town. I struck up a conversation with the receptionist while I was in the waiting room, and mentioned I was a photographer. I gave her a business card, and went in for my cleaning and never saw her again... until about a month ago when I photographed her sister's wedding!!! The bride never really told me how she found me, but now I know!
I am fairly young for the business, I'm 24. I started my business when I was 21, I only did weddings and senior pictures on location. We (my husband and I) moved to Shelbyville last year, and opened the studio a few months later. Business was slow, especially since we were new to town and no one knew who I was. But even after a year, we are now one of the top studios in town. Don't worry about under cutting others in the area, you charge what you feel is right.
tim, I'm sorry, but $50 for a 6x4??? That's gotta be a hell of a profit margin! Is it printed on gold? I personally charge $50 for a canvas 8x10.... but to each their own. Like I said, I'm from a small town, and people around here have to work 5 hours just to make $50.... I just can't see charging that much for 1 picture. If I were in a big city, yeah... I guess I could.