Please refer to this thread for a detailed example of a scalable deployment rolled out by https://switch.ch for Swiss higher education purposes. They even open sourced the ansible playbooks they created at https://github.com/switch-ch/jitsi-deploy - this should hopefully get you started.
You can get Jitsi automatically installed in dedicated cloud environment using Jelastic pre-packaged solution. Just follow the step-by-step instruction.
Jitsi on Jelastic is available across different hosting service providers, so you can install it on servers located closer to you. Also, some of the partners provides free resources for hosting this application:
CloudJiffy provides two months of free Jitsi hosting within regions in Germany and the USA
Hosteur gives two months of free Jitsi hosting across their data centers in Switzerland and France
SaveInCloud, service provider from Latin America, offers 20 days free hosting of Jitsi within their data centers in Brazil
The links for registration to these providers are available in the Jitsi guide.
Good luck with your project!