Fun read! I'd like to do something similar if I had any control over my apartments heating at all.. Sadly it is all just manual valves on the radiators.
I used to almost always use an as low f/number as possible, but after some time I have learned moderation and I think this is the kind of experience that led me there :)
Just got myself a a7iii as well. Very happy with it!
I don't doubt you could do it, but I'm rather looking for a reputable company providing it as a service. Not a random stranger on the internet 😄