Need help. Not sure if this is the right place to ask

I have a question to you. I am planning to buy a power BI license but I am not sure if this is a right product for me. I will explain you what I am planning to use it for (approximately). 

Let’s say I have a website where users can rate cars. Say, you want to rate a Mercedes you recently bought. By going to my website you will see a web-page with a chart on it. The chart will have 3 categories related to the overall car quality : Good, Average, Bad. It will show, for example, that 30 % rated this Mercedes as bad, 30% as average, and 40% as good. Then, you will be able to rate the car too. After you give your vote, I want the chart to automatically update the results to include your rating. So, basically it is a review site (like Yelp) but with charts. These charts will be simple, but there will be many of them (maybe 10,000, maybe 100,000, maybe more).