What you are describing is a very typical "business application" something that is a step above a spreadsheet and a word doc on how to use it.
In those scenarios, the _real_ cost isn't the $5/mo VPS but the managing upgrades, security patches, etc - which would be mostly handled for you in this scenario.
In those scenarios, the _real_ cost isn't the $5/mo VPS but the managing upgrades, security patches, etc - which would be mostly handled for you in this scenario.