I'm receiving quite a few answers to my question about the financing of Monty Python and the Holy Grail. No two estimates are the same which apparently has much to do with the fact that the value of Pounds Sterling fluctuated a lot in 1975. So how much it cost then has a lot to do with when in 1975 the money was spent.
But all the estimates so far are between 1.8 and 2.1 million dollars. That's close enough for me, thanks.