RE: Getting Started for under $300
The Hobbico Superstar 40 RTF is $280 at Tower, but there is a $50 rebate. Add a Hobbico Field Pack with all the basics for $49, some fuel and couple of extra props and you're ready to go.
The $1 membership at AMA is for Juniors. So you have to add AMA and Club membership. I usually tell people that show up at our field to expect it to cost $500 to learn to fly.
Carl