good pointsIf you are a service provider, its a lot easier to have multiple cloud instances or rent space in a data center and create VPS's of your own. IncrediblePBX is a known quantity with good support via the forums. It is easily mass-produced to multiple instances of VPS. At $3-$5/month for reliable cloud instances, I wouldn't waste my time on multi-tenant unless you're like a Ring Central or Avaya or Cisco.