Your order of operations is inverted. The existing data center providers have been doing this for a few decades. Equinox, Dell, and friends are the ones who do

Your order of operations is inverted. The existing data center providers have been doing this for a few decades. Equinox, Dell, and friends are the ones who do the build out, management, etc. If youre big enough theyll also build to suite, though at that size you probably have a lot of in house expertise as well. AWS, Azure, Google Cloud, etc are the alternative to dealing with dedicated physical infrastructure and financing. Things like AWS Outpost are there to bridge the gap for companies/workloads that dont fit existing public cloud offerings.