A blast from the past! Pyscripter was definitely a top contender back in Python 2.3 days. Not sure when I stopped using it and why. Seems to be actively maintained. Will have to try again.
Yes, I had it installed back in those days. I stopped using it because Notepad++ (quick check something without getting asked for permissions) plus VS Code (linting, refactoring, other small things) plus my pimped Code browser 4.9 (Zen-like Overview) do the things I need.
This seems like the story in "The Phoenix Project". If the outsourced software is critical to your operations, it seems it should be brought in-house. Software design is best done when the feedback loop is very tight. It never is with outsourced software.
As for how to go about building a team, you are better placed than I am to figure it out. Probably start with a small team with the most critical bits and build from there.