The total cost for my series was around $300, eight years ago (yikes, I am getting old). Insurance didn’t cover it.
A couple of years ago there was a shortage in the human vaccine line, with problems in one of the factories that make the FDA-approved vaccines, and the other factory unable to meet the demand. Some pre-exposure people (students just entering veterinary medicine) had to wait until supply increased before getting their series, and some places were considering looking at their post-exposure protocols and determining who really was exposed (ie, what did they consider as exposure and hence, deserving the vaccine).
As far as I know, that has been solved in the US.
Siam, as far as I know, the Red Cross here doesn’t give vaccines, perhaps it is something that varies by country, as you’re in an area that has a higher incidence of disease than the US.