Buy an apartment or cooperative shares?

A wonderful good evening ;)

Some facts

My father owns a condominium (about 45 m²) in which I currently live and also pay rent.
This is secured to me as an inheritance.

(My sister has a similarly valued apartment in our inheritance.)

However, I have to pay rent for this.

Me - 21
Father - 55
Sister - 23

I see my conflict in the following situation.

Either I buy him the apartments, because paying rent there until I can claim the inheritance is not worth it.
- He pays out half to my sister.
- And I renovate.
Would probably come to about €200,000 including renovation.

Or

I buy cooperative shares.
Move into a low-cost apartment.
And save until I then probably acquire a hereditary building right plot with a new build.
Whereby I then have to make sure that when I claim the inheritance, I can financially manage taking over the apartment while financing the house.

New build yes or no?!
Hereditary building right yes or no?! (Where would the disadvantage be there? Term 99 years. Why should I buy a plot of land?)
Already plan the inheritance at the beginning of the financing? Maybe then new renovation work will be due to rent it out if my father is not inclined to do it himself in the near future.

Hope you can help me straighten out my thoughts so that I can fixate on one option. :confused:

Best regards Blacky

Do not speculate with what you do not yet have. Not even with inheritance. Your father is only 55, so he can easily live for another 40 years or more. Then you will be 61... do you want to wait that long? What will the place be worth then? If your father does not reach 95 and becomes in need of care, he will probably need both apartments, because such a care place easily costs 5000 € per month. Therefore, do not count on what you do not yet have. And at 21 you are still very young. Save as much as you can, and if you are sure, build... at 30 or so. Leasehold... you first have to get such a plot. We tried for a year but didn’t get any. And that despite having very close relationships with two church congregations.

Okay, thank you very much for the correction :)

I will then plan everything so that I build with the purchase of the land and set something aside for myself to take over the apartment, in case it should happen during the course of the financing. (It's not peanuts, such a takeover with taxes etc.)

Should not be a reprimand, just a general tip. Salary increases, etc... those can always fail to materialize. If you approach a property like that, you might as well count on a lottery win :) Although the salary increase might be more likely.

Thank you for these contributions, then I will simply plan everything so that my house construction is completely based on "facts."

But now one thing interests me, this is more for those who have already built: if you build, for example, a plot of land with a house, basement, garage, and garden, is there perhaps a percentage that one should still add on to be on the safe side?! With a total price of about 300,000 maybe 60,000 as a lifeboat so to speak?! (20%)

How was it for you??