It's priced for custom windows + install. They're relatively large (all about 3x4ft) and the higher quality option.

My mom said I got scammed, I know I could definitely get the job done cheaper if I'd have done the work myself but I felt it was to big a job for me to take on myself. But I did do the rookie mistake of only getting one quote before agreeing. Should I have shopped around more or is that a fair price?

Update: guys please, 70 comments, I have my answer. Thank you all for responding