$43 billion seems like a lot, but I suppose there are secondary issues to take into account like expansion of development near the train line, decongestion of existing transit ways etc. Does seem like quite a bit of dough though...
The secondary issues are what the promoters of the project want to project.
They underestimate by 200% and the over estimate the other by 100% at least.
There will be some development near the stops, eventually when there is sufficient demand (ridership).
Making it so the end points are not convenient to get to will affect ridership.
The cost point for the time vs flying has to be considered for ridership.
Adding multiple stops to get approval will slow the overall point to point ride which reduces the effectiveness.
If there are 3-4 points in the inland valley route; will those either become business destinations or feed enough riders to justify their stops and impact on the others.
Maybe only have 4 main points on the HSR and a feeder line to connect the political issues to the main points.