I was running all of our websites - see status.tromsite.com (plus our personal ones) from 2 servers paying 68 Euros a month. On TROM.tf I was at the limit of our storage space. Now I run the same websites with some 72 Euros a month and double the storage space, via 2 hosting companies (never put all eggs into one basket) - Webdock and Hetzner.
Plus I need to pay 270 Euros a year for backing up all of our servers to BorgBase. 4TB of data.
Lastly I pay 13 Euros a month for my and my family's personal files backups (5TB - plenty of storage for years to come).
A few days ago someone was asking me over email how can I sustain TROM financially with so many services and projects. Well it is because I work a lot to manage these servers and backups, else it would be 5 times more expensive. And thanks to @YunoHost I am able to provide the many services we provide via TROM.tf. Without them there would be no TROM.tf. I wish I had more money to support them too, a little bit. But TROM is far from being financially sustainable.
But damn I love that we have our own social network, video platform, cloud for files and collaboration, chat, and more. Thanks to the open source projects like Friendica, Peertube, Matrix, Nextcloud and so forth.