One interesting area which is a minor minefield to negotiate is the whole issue of preventative medication, as Big Light says.
Quite a few of the livestock keeping books, esp the older one, have calendars which if followed would mean wee were drenching worming jabbing or bolusing our animals (esp sheep!) virtually every month of the year. A lot of people who go into smallholding arent so comfy with doing that unthinkingly, and also esp with worming, we may also have horses and so be aware of the downsides of blanket treatment.
So a course which looked at how to judge what things were needed for ones animals/environment, the ability to (as others have said) source small batches at reasonable cost for the things that are really useful (like Heptovac p+ or ovivac), and updating on the latest thinking would be very useful.
One idea if there were a number of related courses would be whereby you could pay a fee of £x and then be able to attend as many of them as you wanted to, space allowing. No shows could be discouraged by you having to pay for the course on booking but as you had a sub, the course fee would be returned if you turn up to the course.
Maybe SAC could also host an annual small x-keepers (sheep or goats or whatever) conference each year, where you could have quite a few speakers/discussions eg someone updating on ID regs, transport regs, disease, new drugs, marketing, breeding, vet issues such as foot trim or cull etc.
CSSA courses arent of any relevance given the distances involved to a huge number of smallholders and also would be smallholders. Altho not as wealthy, smallholders up here can I think be more willing to come to a course as long as they can reach it and the cost is not prohibitative, SAC could play a big role.
I too attended the lambing course a year or two back and it was great, and Im glad to have the notes. I will consider going again as thankfully my sheep have not presented me with any difficult births (thankyou Shetlands!) and so I am getting rusty!