Depending on your disability, you might already be qualified to be an expert consultant on software development to accommodate users with your disability. If no

Depending on your disability, you might already be qualified to be an expert consultant on software development to accommodate users with your disability. If not, that's fine too, and you can quickly become knowledgeable in disability consulting for web applications (how to structure html/css so that pages can be read by screen readers). There is a lot of work in this field and when you're really good, you can make that $1200 in one day. If a particular job requires several days of work, you could ask the client if you can bill them $1200 at a time over several months.