There are a ton of open source php scripts available for use, and I know enough php to modify scripts when needed.
I wish they were all written in Phyton. I did just find a nice Phyton CMS system -
Skeletonz CMS - that I'm looking forward to trying out at some point.
If I write anything from scratch myself it will be in Phyton, not php. I doubt I will have to write much from scratch to develop the domains though.
I'm certainly not making any commitment to making every domain Phyton based. Learning Phyton would take a while, then I'd have to write various CMS structures from scratch, etc. It would likely take years; I don't want to put off developing the domains that long.