How much content does a website need to get ranked?
Is there a threshold for the amount of content on a website to rank well in Google search? Or is it also possible to rank only sepecific sites if they are really good?
More contents with quality and keywords
The answer to your question is simple, more content is better. But you have to remember that, the number is not everything. Google always emphasizes on relevancy and quality contents which will satisfy the users. So, more content is certainly better when you can ensure value for the information you are providing with relevancy. And when you are trying to reach an audience, the next big thing is Keywords. You have a target audience, and probably have a data matrices what they may want to know. You have to include the words and/or phrases to attract them towards your site. Proper use of keywords will enhance the probability of your site's getting shown in the SERP.