The co-location costs are relatively minor. The bulk of the cost of self-hosting comes from quantization: needing to buy 2x (for HA) of things and then not bein

The co-location costs are relatively minor. The bulk of the cost of self-hosting comes from quantization: needing to buy 2x (for HA) of things and then not being able to use the full capacity. Things like tape libraries, Internet routers, hardware firewalls, etc... The multi-vendor aspect can be expensive as well. There's a lot of different end-of-life issues to track, firmware to update, specialist skills to hire, and so on. Just backup alone can be shockingly expensive, especially if it has a decently short RTO/RPO and is geo-redundant. In Azure and AWS this is a checkbox.