I worked professionally producing landscape and scenic images from 1994 to 2010,, but my skills in photography started in 1977. Now semi-retired, producing prints for my own pleasure and possible sale through the hybrid process (previously it was 100% Ilfochrome Classic). As a business, the analogue photography model is dead. Competition, particularly from digital "professionals" is your greatest threat: it's speed and quality appeals to the masses. Ensuring there is money coming through the door immediately something is sold (and not writing an invoice and hoping for the best) is an essential discipline for survival. The arrangement I had was that if a purchase was confirmed, a 20% deposit was required and the balance paid within 21 days, and in 90% of cases it was.
All this put food on the table, fed the dog, put petrol in the car and allowed me to actively travel locally, interstate and overseas.
Photography is expensive, any which way you look at it. Equipment, studio space, exhibition/gallery space, rent, electricity, water, gas... everything has to come out of what you are selling, or some other peripheral income, such as an Arts Council grant (in Australia). There are plenty of professionals in Australia doing it tough because digital has made it so much more difficult to be the leader of the pack; if you're only analogue, it will be impossible to be "different", "better" or more "desirable". And the biggest, boldest, baddest, wings-n-things DLSR, or any other camera, is not the answer. To get ahead now you need business acumen and the ability to reach out and touch people with your work, to network and blend in, and have people coming back. Corporate, advertising, weddings, stock and the like are sure-fire winners, but your work must be of stellar quality and will never hook people if it is analogue. The world wants their photographs now, not in three hours after a darkroom soiree.