I don't really understand your second question. Possibly a language barrier. Godot works great with source control because the editor files are stored in text format. I'm going to assume
VCS was a misspelled acronym for Visual Studio Code, in which case, yes, it works very well. The Godot editor can open files in VS Code and it can be used as a debugger.
Grimante was made with Godot by one person and sold an estimated 20,000 copies.
One thing to consider with Godot is that you aren't really a one-man operation if there is a team of people releasing engine updates along with dozens of open source contributors. Add to that a very competent team at Microsoft if you are using C# for scripting.