Flashing GrapheneOS on a new phone took 10min tops. Setting up Nextcloud using their Docker image does not take much longer than that. Setting up my email server took the most effort, but I did this in hard mode using bare Postfix and Dovecot on Linux. A dockerized email server could be up in a matter of minutes. There is no maintenance beyond sudo apt upgrade.
I think the question between the lines was "how much time did you take to the point where you know how all that stuff works?", or at least that's what I'd include in the spirit of the concern (as someone who knows all this too, and knows that the answer is 100's of hours)