Large condominium associations - food for thought / pros and cons

The apartment is already finished and not still under construction? If so, then take a look at the resolution collection (all the minutes from the recent owners' meetings). There you can get a pretty good idea of what is going on in the HOA.
Otherwise, much depends on the property manager. There are capable ones, but even more incapable ones.
The more parties involved, the greater the potential for conflict. I often mention the unflattened boxes in the overflowing paper bin... a classic in almost every HOA. Such things shouldn't bother you.

Phew, no idea. Does anything stand out? Otherwise, I can agree with the previous speakers, 20 units is not a big deal. And whether there are 7 owners for one house or 20 owners for three houses doesn’t make much of a difference. The WEG law is decisive but allows for divergent regulations.

So, I’m interested, for example, in the voting distribution; currently it states: "the condominium owners’ meeting is quorate if more than half of the existing condominium owners as well as more than half of the co-ownership shares are represented." There was an update in 2020, and this is the "old version." Therefore, I’m interested in which divergent regulations are permitted. I have to look that up. So far, it reads quite normally. I just don’t want to be "kicked out" for "costs" by some dumb investor in 20-30 years, for example. It’s a new building.

I just don't want to be "kicked out" by some dumb investor in 20-30 years, for example.

Investors are only a problem if there is one owner who has almost all the apartments. No investor comes and buys apartments from 15 people in one building. Much too complicated. In a building of that size, you are either dealing with owner-occupiers or small private landlords.

There was an update in 2020, and this is the "old version." Therefore, I am interested in which deviating regulations are permitted. I have to google through it once. So far, it reads quite normally.

This is the only correct version as of 01.12.2020. Deviations, as far as I know, are not possible through the declaration of division either.

In the house size, you are either dealing with owner-occupiers or small private landlords

Mostly, but not necessarily.

No investor goes and buys apartments from 15 people in one building. Far too complicated.

Oh, in a small town, they quite often come together at just three banks. They know the real estate agents, and it goes smoothly and quietly.