Ok, your questions sounds like you want to verify if your strategy is right or not... In my personal opinion SEO strategy can be different from person to person because everyone can use different tactics to attain success and there is nothing wrong with this!
In my opinion, you are focusing too much on the quantity of content and missing the fact that how you are going to marketing each piece of content and grab real people’s eye on that! I think what you should really consider is to focus on marketing of your content and how exactly you are going to cater people to the website to read your content... No matter how quality your articles are but if you are not going to market it, it will drown in the deep sea of content in the online world.
Try to limit the content that you are going to make live on your own blog and consider outreaching to other similar websites within your niche and write on their blog as a guest author (instead of article submissions).
You should also exactly define your off-page strategy about how exactly you are going to get links on each article that you are going to make live... from links i mean quality links... dot run for blog comments, forums and directory shits...
As the business goal was not define so it was difficult to come up with a solid answer but i hope that this information worked out for you!