I do not own any miners, but have been running a 2mw hosting facility the last 8 months and started with the company(and mining) 18 months ago. At my site we have about 600 machines currently. And host all of the above mentioned miners. 360 s19 series, about 100 avalon(1246 and 1166 pro), some L7, goldshells, and some what's miners m21-m30s++.

The facility is non climate controlled with temps ranging from 10-102f.

My experience has been most positive with s19 series, main failure being psu but also bad soldering on hashboards.

I very always liked avalons(started with 1046 and now to 1246 and 1166pro). They're simple to work on and once you understand the kernel log typically pretty easy to figure out any issues.

The site has about 40 what's miners. There has been 1 WM fail since we began hosting. They have by far been the most reliable. They also run the hottest by far. And due to the really low failure rate, that is the miner brand I have the least experience with lol. Really small sample size(40 out of 300 compared to 360/600 s19 series).

Our company started a sister site that just got fully set up a few months back. 10mw. Running exclusively WM.

Depending on where you live(weather/temp based if non climate controlled) can be a main reason for going with any specific miner. Power consumption/availability is the obvious first factor. Understanding flow dynamics and keeping fresh intake cooler air coming in and not getting heat swirl from the exhaust coming back into the mine can be a huge challenge. Once you get that figured out, it makes keeping a lot of miners physically in close proximity to each other consistently mining.

Long story short, even though WM are the least experience I have...I'd go with WM. Specifically because that is the least experience I have out of the above mentioned miners(they have stayed mining consistently excluding curtailment periods). More uptime means more money, less failures equals less cost.

Good luck! Hope this helps. This is my first post. I'm pretty much self taught with mining, so take my advice with a huge grain of salt!  I'm the only employee at my site now, and have managed to keep 600+miners running 99% of the time, with a failure rate under 2%, for the last 8 months(similar results the previous 10 months but completely different setup/dynamic). Saying all this to give an idea of why I'm giving my input/recommendation.