Comment by aetimmes

I think the word GP is objecting to isn't "your own" but rather "build".

For people who have taken empty lots and constructed new data centers (ie, the whole building) on them from scratch, the phrase "building a datacenter" involves a nonzero amount of concrete.

OP seems to have built out a data hall - which is still a cool thing in its own right! - but for someone like me who's interested in "baking an apple pie from scratch", the mismatch between the title and the content was slightly disappointing.