Again, a bit of both. I can do this by myself, but it's kind of a small scale thing that could make sense to share a pool.
This isn't a go build some huge scaled up thing, it's pick a few things you wanna host and sell it to maybe 500-800 people and just sit on it and maintain it. This isn't a high growth crazy margin play it's an its available and most people don't know how to do it play where you can turn 100k into 200k reliably YoY once it's fully subscribed.
It could be as easy as specializing with law firms, could be a "mail us your hard drive" business and an ephemeral VM that can mount a drive and only decrypt it using a key passed by a yubikey in a client. Lots of potential angles here, but things that remain consistent:
You can buy 1GBPS symmetric bandwidth for ~900/mo
Power and cooling are baked in and contracted long term.
There is no restriction on what we can put in the rack from a capitalized hardware perspective and there's a lot of room with today's rack density to put in a single rack.
Right now I still have capacity I could reclaim in my current rack and optimize it, but having a second is good for redundancy and potentially scaling.
With hardware from last capex cycle you can easily support 5PB of storage, 10TB of DRAM and 2000+ cores of compute in a single rack without breaking the bank. (Let's call it 3.2PB of HDD and 1.8PB of SSD)
For reference in AWS the monthly bill for that alone would be in the 6 figures per month with egress fees that go even higher based on usage. When you own the bandwidth you have no ingress or egress fees you buy the pipe.
Its a unique opportunity because I have a relationship with them and they will do this instead of rack up their own VPS capacity and its in a top facility. You can't just walk up off the street and get into something like this.