I haven't done a workload calculation - but I confident your assessment is right.
I need a 120 notional learning hours (i.e 3 micro's). Probably later down the track once I get Otago Polytechnic as an assessing institution we would add a fourth micro - for example "Sustainable business practices".
I recommend that we bolster the learning hours by:
1) Incorporating the "Pedagogy of discovery" where learners are require to source, evaluate, share and reflect on open access resources they find in relation to the topics covered in the respective micros. 2) Building in substantive project-like challenges (eg preparing a business plan will consume learning hours.)
These approaches are not likely to consume significant development hours (when compared to authoring material from scratch). The storyboard will give us a good indication of gaps we need to fill.
For now - the critical path enabler is at least one OERu partner who has an assessment, which TESU provides (3 North American credits). I am planning to bring in Otago Poly as an assessing institution (possibly using an assignment model for the assessment) - but that will still take some time to organise.
In the mean time - we can assemble a course, which understandably will cover more "learning" than is being assessed at TESU.
We cannot host any text on WikiEducator which is NC. So we will need to compile a downloadable reading on cloud.oeru.org.
In the course materials - we set up a "Reading activity" and direct them to the download link.
There is another legal technicality - albeit low risk in this context, specifically that the four license types cannot be remixed as a derivative work and then applying an open license to the derivative work because you can't remix CC-BY-NC-SA with CC-BY-NC-ND (not too mention that the latter states no-derivatives.)
My suspicion is that the original materials were sourced from a Lumen learning course - see:
Lumen has adopted the practice of attributing every sub-page on their site thus honouring the license provisions. My suggested work-around is to identify the corresponding licence for the sections from the Lumen site and then qualify the end-note for example: Section A based on ..... or Section B used verbatim from ... (in the case of the ND.) As long as we can clearly identify the licenses for the respective sections, we should be fine.