You can run fast nodes on low-cost hardware using #[3]

For something small with NVME support & ram up to 32GB - look at something like a Lenovo ThinkCentre M920Q - they are 8th gen Intel CPU (i5, i7, i9) & compact. You can do anything with those

I built the node above using a Raspberry Pi 4 8GB, a 1TB crucial SSD that I already had so the cost was only the enclosure ($99)