I did a metal roof for my parents house last summer.
It wasnt the entire house but an addition (extended dining room,
large den, and carport that was made into garage)

They already had a metal roof - which cost them about $11,000 (canadian)
about 7years ago.. The addition was almost half as large as the house
and this time the same supplier quoted $11,000 for the roof on the addition & $2500 per skylight (there were 4). So this came to about $21,000 Canadian. I understand prices had gone up since the roof was last done but - right now on the Westcoast - the construction industry is busy and they can set the price.

I ended up finding the manufacturer online cant remember the name, (they had a great installation guide) and directed me to authorized dealers. THe price from the dealers varied from $1.90 - 2.50 per linear foot) So I calculated all the sizes Id need and ordered them cut (as well as flashing for gables, ridge top etc) went with the $1.90 price and the material costs came to $3600.00
(& the skylights were $150 each). This was 12" wide painted steel roofing with a snap in on one side and screwed in on the other..
It was a learning experience and kind of fun, although I wouldnt do it on my house as it is much too steep.

The only tricky part was around the skylights, but so far made it through a very rainy season with no leaks.

Without knowing the details Id say the price given to you is a bit high, but maybe not out of line given that it is metal roofing which should last 50yrs.