Hi Alan,
the campaign says on the website "Assemble your own PCB prototypes, get to market faster."
This sounds not like hobbyists, it sound more like small business. If small business is your target, you will
definitively need more feeders.
I am running a small business and use a TVM802B (46 feeders) extended with 20 cut tape feeders and 14 trays,
and there are still boards where this is not enough.
Not all boards are just a uController and a couple of 1k resistors and 100n Caps.
Just as an example: building high frequency boards need a large number of different capacitors, inductors and others, all with different values.
But if your target users are mainly hobbyists, in this case 40 + 2x5 is fine.
Harry