Just to add my experience on this issue.
Bitnami is a horrible image, gives a lot of troubles and mostly can only be handled by bitnami developers, my suggestion is to steer clear of it.
with regards to magento hosts like- nexcess or cloudways , I never understood why they are more expensive than the similar configuration on DO or AWS or for that matter any other server providers.
@digitalstartup , Could you tell us if there is any difference in the services provided by these specialised hostings services vis a vis the general servers available and does it justify the price difference