FPS Game Development Consultation

Hello and thanks for taking the time to check out my request! I would like to start a game studio and need to consult with people who have an understanding of what it takes to develop a game. I lack a background in anything technical which is why I am seeking some advice for what technical limitations I will face, how big a development team needs to be, and similar questions. I am looking to create a first person shooter that is similar in style to games like F.E.A.R, Dark Sector, and the Killzone series. I am looking to create a campaign between 10-15 hours with the focus being only on producing a quality game for a fair price. The gaming industry is incredibly frustrating these days and I would like to produce something that is fun to play and doesn't reach for the players wallet. I would be willing to handle all of the business aspects of the company but simply have no knowledge in regard to what it takes to actually make a game. I have been a gamer since the days of the N64 and find it frustrating that the games I would like to play simply don't exist anymore, that is, single player FPS titles with no micro transactions and a tense atmosphere. If you have an idea of what direction forward is in regards to how to make a game in this direction I would love to speak with you!