Too Long; Didn't Read
Using an ephemeral AWS EC2 instance for development costs me less than $10 a year. The secret sauce is a CPU Alarm that shuts the instance down if you aren't using it. If you terminate your instance when you are done using it, you'll run a little over $0.01 an hour. The solution is free under AWS Free Tier, but that doesn't last forever. It'll run you $1.46 a week at 40 hours a week, $1.,84 a month, and $22.10 in a year, all assuming you are running the instance for 40 hours per week.