From what I’ve seen, your $/h for any type of part-time software work is going to be very low.
You know who has no idea what the going rate is for a decent website? Small business owners. That’s why they don’t have one to begin with.
I’ve found that if you’re going to freelance, you need to do it full time. Your going to be passed over if someone can do it twice as fast for the same rate, so you really have to slash your prices if you want any business.