Shortly after purchasing that rack, I had already ordered a Dell Poweredge R410 from a seller off eBay to start off with. My very first server!
I was anxious, so I had it shipped to my mom's work, I had this wild thought in my head that they wouldn't ship to a residential address because it was a business product. Not sure where I got that idea from, but regardless it arrived!
With a measly 12GB of RAM, an Intel Xeon E5620, and a 500GB HDD I picked up the same day from Micro Center to work with, I had to be very selective with what I ran as to not run out of resources!
It also had iDRAC 6.0 which allowed for remote management, yay for not having to go downstairs anymore!
I was able to migrate the Nextcloud instance data over to a fresh install, as well as make a Debian VM, and start a Windows Server VM, but that was my max. For now.
I continued to run the older Dell Inspiron tower for core services like routing, DNS and VPN access below the R410.
I also acquired some rack-hardware like a keystone panel and a shelf for connecting to drops I had added throughout the house. Nothing like ethernet in every room!
I also rack mounted a display for use with the keyboard shelf below. Looking sick!
I used that Debian VM to host the controller software using a really nicely made installer script I found on Ubiquiti's forums. Still works IIRC!