I will suggest you purchase these content instead – if you look at a time spend versus cost, you will save money in the long run. Also, you must be a trained and skilled learning material designer with some ETDP qualification and off course some experience in development of material. Tass Schwab is on this platform for years and well know by most of us in the industry, and I believe the content is reliable as stated. As a material developer myself for five years for different institutions, ie. SETA’s, colleges and universities, I can vote that the task you illustrated above can take you up to 5 months flat, meaning six days a week, and you need to be an SME in all of the topics mentioned. I have a PhD and thought well; this is straight forward. However, it was not. I had to incorporate SME (subject matter experts) to review content, pilot the material and before I know it – 8 months have passed, no money in the bank equivalent to time spent.
I suggest purchase content from a well known reputable person.