Not surprised: $2.3B is chump change in semiconductor manufacturing especially if you're starting from scratch. Double that, add a zero, and wait 5-7 more years.
So 50B? That's nowhere near what you need. Last year both TSMC and Intel announced they are spending a hundred billion each on new fabs (TSMC in April, Intel in July) and they have all the R&D already and good relationship with ASML (and both own a few percent of it, too). But the US banned ASML from selling to China so you need to catch up with ASML and Intel/TSMC at the same time. Now, I don't know when ASML starte…
do you know what the cost breakdown is when building fabs?