Well, first of all, focusing on the financial products niche or financial services is definitely a great step in the right direction.
Generally speaking, the financial products niche tends to pay more than other niches.
Also, the fact that you're going to focus on FAQs should reduce your content costs because instead of some sort of free-form article format, you have a set question and answer form—this is much easier for both the writer and the reader.
Also, if you know a thing or two about crowdsourcing content, the FAQ format simplifies things even more and can reduce your content costs to zero.
To promote this blog, I would suggest that your first step should be Quora because it already is in a Q&A format.
I would focus on targeting Quora questions that already rank on Google.
You can easily find this by running the Quora domain into tools like Semrush.
You plug in your target keywords, and you should be able to find existing questions that rank in the top three—start with those.
Next, use Twitter because Twitter can also be question-centered.
Take the facts that you have, strip down the questions, and then supply the answer—which is, of course, the URL of the post.
The trick to Twitter is that you have to republish the same question and answer several times to get a click—that’s just the nature of the beast.
The good news is there are all sorts of free tools out there that will help you schedule a fairly huge amount of content, so you don’t have to do this manually.
It also helps if you find finance-related hashtags on Twitter and rotate these hashtags with each publication of your question and answer.
Reddit is also a good place to get traffic for this type of website because people ask questions.
Now, with Reddit, you have to be very careful; you can't just flood your post with all sorts of ads
That's not going to work with Reddit; in fact, it can work against you.
So I would suggest that, in the beginning, when you're just trying to establish a brand for your FAQ-driven blog, hold off on the ads and just be more active on Reddit.
Of course, it also helps if you are actually a credible source of information on Reddit.
What this means is you should spend some time commenting and helping other people out before you start sharing info from your site.