Tried and it was horribly slow. We add about 5TB of logs per day, and the ES index wasn't able to keep up, despite having 256 GB RAM and 2x Intel Xeon 6-core
On their German website, you can bid for used-but-still-good servers and there you'll find great offers. There, you can also find hardware that they customized for others and then didn't need anymore. For example, I rented some GPU rendering servers for $110 monthly each from there.
Plus I can't praise their service and ops team enough. After we rented the new storage servers, I sent them an email to ask for it, and they then put the new storage servers on the same router inside the same datacenter as our other servers with them. Now we effectively have 2x redundant 1GBit LAN between our servers with them, plus an 10GBit internet uplink shared between our servers.
For that level of performance, they are ridiculously cheap.
BUT - and that is a big gotcha - you will be responsible for diagnosing hardware issues and asking for a replacement yourself. That's why we have RAID and two storage systems with them, because we tend to see one HDD fail every 3-6 months.