How to choose: answering the main questions
How many VPS fit on a server?
Sales practice: 3–4 vCPUs per physical core for budget tiers, 1.5–2 for high-performance ones. A dual-processor platform with 512 GB RAM and NVMe can host 80–150 typical VPS instances.
What about drives for hosting?
NVMe only in mirror/RAID10: clients instantly feel the iowait of neighbors. Separate disks for backups are mandatory — client recovery should not load the production environment.
New or refurbished hardware?
It is cost-effective to start with refurbished Dell R640/R740 units: the price per unit is lower, and ROI is faster. Flagship plans are available on the latest generations with DDR5.