I’ve set up the new site using Digital Ocean (https://www.digitalocean.com/). They provide virtual machines that run on solid state drives at really great prices.
I’m running the shed on 1GB of ram, 32GB of SSD and a single CPU at the cost of $10 a month.
Given the way that NodeBB is written, most of the work is done on your browser rather than by the server so the relatively low spec of the VM is adequate for the current load.
Digital Ocean is only for geeks tho as you’ll have to be able to drive Linux from the command line.