kudo hosting suddenly shut doors with only two days notice to users to get their data downloaded on Dec 19, 2019. 20 VPS providers did this at the same time.
aws free services - 1 year free web server in the cloud - 1 vcpu, 512MB of memory.
This is the bare minimum memory to run Windows 2019 server in, probably without graphical RDS environment, and it might not install properly in that tight of space
Microsoft Azure
Similar offer to Amazons, web server for a year with a microsoft operating system on it. Free services provided with it: Free account faq
$21.02 pay as go, plus $10.21 in storage - $31.23 a month
1 year reserved drops CPU to $10.21 - $23.71 a month
What happens at the end of the one year with Azure: It becomes pay as you go. link
Windows server 2019
ebay has $60 copies: Windows 2019 Standard - 64 bit DVD, product key 16 core
Note on drives: link - Computers that run Windows Server 2019 must include a storage adapter that is compliant with the PCI Express architecture specification. Persistent storage devices on servers classified as hard disk drives must not be PATA. Windows Server 2019 does not allow ATA/PATA/IDE/EIDE for boot, page, or data drives.
180 days evaluation - link available as ISO / Azure / VHD
Windows Server 2016 Essentials - 180 day trial - seems to upgrade an existing OS. Only available as ISO