Hey, I work for a start-up and the ai models are trained in a AWS cloud system. I suggest on having a AWS server since the company will be requiring host service later on, and it's easier to hold a cloud server and manage it. The security system of AWS is pretty good and hosting APIs is a lot easier with a cloud server. Even training model is a lot quicker since building a AWS standard system will be quite expensive and not just the system cost but the power consumption of the system will also be high. When considering about the cost between a AWS system and a physical system in office the factor of power consumption negates the monthly cost of a cloud system. Also a cloud system could be used on any system from around the world but for a physical system in office, you would require to setup a VPN to access and the system needs to be on power to use it whenever you want. AWS server will charge only while you are using the server with a minimal monthly charge. In comparison a physical system will be initially expensive and the cost of electricity, vpn and systems and room for cooling will cost you more than a AWS server in the longer run. Hope you found this helpful.