it's insulting to read text on a computer screen. I don't care if you write like a 5 years old or if your message will need days or weeks to reach me. Use a pen, a pencil and some paper.
You put there quite a lot of work and interesting features.
One of the reasons why I like dlt is because I can do everything via code, which makes things more maintanable, for me. I think this could be a starting point for a dlt SaSS, but there are a lot of things to consider and connectors change all the time. It's something I thinking about a lot... :)
I think you will get more feedback in the dlt slack/community.
Move to Germany. Probably you had to move a bit earlier for you to enjoy the full parental leave here, but grandparents will be a great support.
Do not worry much about the small village, actually use the opportunity (lower costs) to invest in your German (learn as much as you can with classes and talking with the people around you).
Quality of life in Germany is much better than in the USA. Kita places are hard to find in Berlin, but you will be probably more lucky in a small town.
When you daughter will be 6 she will start school, and in Germany kids cannot skips school days, so you will be forced to stay put except for the short holidays during the year (when everybody is travelling too), my suggestion is to see Bavaria as a starting point to visit Italy, Austria, Germany and other countries around (at least for the first years).
Regarding careers as SWE you both should not have any problem. Worst case scenario they will require you to go to the office for a couple of days once the pandemic is finished, but it will be quite hard to enforce that :)
Also your kids will not do shooters drills in school
With the introduction of piloted robots for civil work, there will be also accidents and attempts to use them for criminal purpose. Quickly the Tokio Metropolitan Police will introduce a Special Vehicle Section equipped with patrol labor (instead of just patrol cars) or Patlabors.