You've built the MVP.
Now it's time to figure out how much it will cost to build the market ready version of your software.
What you'll need:
When you build the market-ready version of your software, it's possible you build it with an in-house team that your CTO helps you hire.
It's also possible you use an external agency to build your product.
Either way, at this phase, the easiest way to estimate your development costs will be to have an agency quote it out for you.
Agencies usually cost more than an in-house team so if you end up going with an in-house team, the agency quote won't hurt you.