I'm really interested now. Can you all do paid overtime hours as you wish?
For many with children, for example, one works part-time and could then accordingly work more/less. Or take parental leave to work on the construction site.
Or I have considered taking unpaid leave for the construction site. But that usually only pays off for things where I don't take five times longer than a craftsman. Or, like us, you are in the fortunate position of not having to pay rent and can just take a few more months with the construction.
If someone works 40 hours, plus as is completely usual for us, at least 2 hours of commuting time to Munich (round trip), then they leave the house at 7 a.m. and don't get back before 6 p.m. If you then have a demanding job or children, it's really extremely difficult to still do anything significant on the construction site afterwards.
For us, this many self-performed tasks only works because I don't have exactly the 2 hours of commuting time and don't have children yet. Also, unfortunately civil servants are not paid according to Munich standards, which is why we unfortunately have no choice but to put the money in accordingly. If we could easily afford it, we would definitely do much less ourselves...
Specifically regarding overtime, there are regularly opportunities for us to do more. But it's not like you can simply say "I would like to work 42 hours please."