I've had several YouTube ads telling me I should use a "hybrid" approach to self host some of my services, on hardware in my building, to keep cost down. I had to check a calendar to see what year it was!
My first webserver was the most frankenputer I have used to date. I had a friend that was at one of the large colo companies in town. He had a bunch of computer parts that he cobbled together with no case. They were hanging on the wall so that the mobo was flat against a dry erase wall, the PSU was on the desk with cables up to the hanging mobo, the HDD was velcroed to the dry erase wall next to the mobo. Talking about keeping costs down.