How reliable is the Cloud to store Manufacturing, Sales and Financial ERP Production Server (Application and/or Database and/or both) with increasing costs on  vCPU, vRAM and vDisk Space requirement each year as well as Internet Charges by 25-50 users to call and save transaction data and generate same month-end and year-end report over and over again ? (When refer to the monthly cloud cost for 36 months - is it economical to purchase a Medium Range On-premise Server with RAID 0/1/5 on 100/1000 LAN speedy network bandwidth, to save 100% Internet Cost and increasing Cloud Infrastructure costs on vCPU, vRAM, vDisks, Redundant Server, etc)?