I can often charge around £2000 for a website that's simple and easy to build and takes less than a week to produce. Add to that annual hosting fees, and it's a nice earner that brings me money each year. Not much money, but multiply that by however many clients I'm hosting and it's nice 'passive' income. Sometimes I'll manage to bolt on a rebrand at the same time and then we're looking at something like £3000 all in, give or take. Probably 90% of this work comes from contacts of people I've previously worked for, with only a small majority coming from my site. It's taken me a few years to get to this stage though, and I do still design flyers and such like once in a while when I absolutely have to.
It's not just the type of work but the type of client you also need to think about. These jobs are typically for business owners with medium-sized companies, a nice middle ground that means I'm able to handle everything myself but still charge a decent rate. These business owners have contacts that are in the same or similar situations as they are, so they're a great place to get new work. In fact, I'm going to ask one of my past clients to recommend me to one of their contacts because their site is in dire need of updating and if I don't get in there quick, someone else might!