If only your straightforward price point calculation worked everywhere.
Because I cannot see how the relevant TOCs are going to accept pricing a 2 or 3 day season at less than the day return, which is what it would be where I am.
But this thread is also relevant:
Trivia: Highest and lowest ratio between 7DS and SDR prices
I'm sure this has come up before, but I can't find it. The question: For any origin and a destination, such that there are SDR (anytime day return) and 7DS (7 day standard season) prices defined (with exactly the same route*), what are the highest and lowest achievable ratios of 7DS price to...www.railforums.co.uk
I did indeed have the practicability (or not) of "part time seasons" in mind when I started that thread. There are just so many routes where as soon as you're making the same journey 2-3 times a week, a season blows everything else out of the water.