Looked at a couple of Saas platforms from the thread but can't justify the cost right now, also content lock in is a worry.

A few years ago, I wanted to try Talent LMS over a bespoke WordPress + LMS plugin implementation. The price plans (as I recall) are for active users, and there’s a free tier to get things started. www.talentlms.com

Finally the droplet on digital ocean was dead simple to setup but took me a couple of hours to navigate my way around nginx and set it up correctly for a sub-domain, (most of the documentation was geared towards a primary domain). It should cost around $8 pm but will depend on usage.