Good programmers can make decent money, but the problem is you have already stated that you only have a very limited number of hours to devote, so working for someone else would not be fair to them.
I have had affiliates that generated a lot more than $3k/mo as part time webmasters (rather easily), using a lot less b/w than what you have available.
How?
Let one of our most successful tell you how he did it. He made 5 figures a month, selling $4.95 memberships.