I'm up to 15 GPU rigs and 2 S9's.
I started out using nvOC, but the lack of central management really started bothering me once I got past 10 rigs.
So I got Awesome Miner and played with it for a while and purchased a license good for 20 miners. At first I kept the rigs themselves on nvOC (Ubuntu) and then configured each miner in Awesome Miner as an external miner. In this mode, Awesome Miner can only monitor the rigs and not actually change coins, or OC settings or anything like that.
Next I started to convert my rigs over to Windows, which meant getting more powerful CPU's and larger SSD's for some of my rigs. It was a pain, but once done, I now had full control over all the rigs and could switch pools/coins with a couple of clicks across some or all miners. The dashboards are very nice looking and I'm able to apply OC setting on a large scale. I also like that Awesome Miner can manage my S9's. Granted I only have 2 of those and they pretty much mind their own business, but having all my profit generating devices in a single dashboard is kinda cool. I also have some servers with powerful 14 core CPU's that produce a decent return on Cryptonight. I can manage those within Awesome Miner as well.
Then a couple of days ago I decided to upgrade nvidia video drivers on all the rigs and what a royal pain that was across 15 windows boxes. Some of them didn't take and I had to haul a monitor around to connect to them to see what was going on. This was the case on my Onda and Colorful boards, and one of my Asus PRIME Z270A boards too (this particular one had 9 1080Ti's on it).
So I decided to check out SMOS, and I'm impressed with it so far. It is a lot more limited in functionality compared to Awesome Miner, but the fact that the actual rigs are running Ubuntu over windows is a huge plus. I don't like that the only control option is via the cloud dashboard. I wish there was an option to run it on a local server. I can VPN into my network from anywhere if need be. The SMOS dashboard is no where near as comprehensive as what you can do in Awesome Miner, but it covers the basics.
To me the perfect system would be a feature rich front end like Awesome Miner, with linux based backend GPU rigs.
Next time I go on vacation, all my rigs will be on SMOS, that's for sure. To switch I just pull the Windows SSD, insert SMOS USB, switch mobo to use internal graphics, and off I go. Going back to windows is a simple matter of reversing the process.
I have more then one rig in my home that can do just that.And I set the omen gamer pc's up with smos and this usb stick
https://www.walmart.com/ip/Samsung-32GB-USB-3-0-FIT-Flash-Drive/46802252?it is small and I don't worry about breaking it off accidentaly