I know, it's almost sacrilege to speak about that abomination called money in this field, but I'm gonna. I know there are lot of people who are already into making their own stuff or thinking about it. Here's what it looks like in my corner of the self-publishing world. I've calculated the gross, the cost and net of the past month. This gave me, I had a bit of an idea, but not really sure until I ran the numbers, of how much I made and how much was going out. These numbers are about as accurate as I could get them. When I send out comp copies and freebies it's difficult to track their costs.
These numbers can be off putting. This doesn't include all the time I put into printing and mailing these issues. Which is a considerable amount. The other thing is most of my products are below the $5 mark so there isn't a lot of room for profit. But, I do this because I enjoy it. The profit I make allows me to buy other OSR books and populate my shelves with a few other goodies.
There are a number of folks who get pissy about people making a little money off RPGs...ignore them. People can figure out what they want to spend their money on without the help of those few griefers. People can vote with their money if they are interested in what you're doing. If your interested in publishing your own thing than I say give it a go. It's a lot of work, but good fun. I've met a lot of great folks because of doing this and have gotten a ton of support I never expected to get.