Setting up a Development environment in the devel version of the docs has been adjusted for "dual wielding", you might want to check that. Windows specifics are still missing though.
When I wrote these steps there were a ton of issues with the availability of 64bit eggs (there were no wheels back then IIRC) and compilation under Windows with 64bit was also an absolute nightmare. The combination of those things made it an absolute pain to get up and running, whereas 32bit just worked(TM). Things might have changed now. I'm honestly not sure if my Py3 install is 32 or 64bit