It still seems like your cutting corners on these assumptions though, making a 15$ post and making a 200$ post is not determined by steem power alone. It really is content, somebody with low SP can make 200$ posts daily while someone with 2000 SP makes 20c. Your current ability to generate through content creation is 15 dollars a day, having 20,000 in steem power wont necessarily translate to those posts being worth 150$, if it's the same content.