https://nces.ed.gov/collegenavigator/?q=bennington&s=all&id=230816#finaid says that 90% of Bennington’s students get some grants or scholarships (average amount $39,170), although only 20% get Pell grants. List price is $73,270 for living on campus.
https://nces.ed.gov/collegenavigator/?q=bennington&s=all&id=230816#netprc lists average net prices by income bracket; they do not look particularly affordable to lower and middle income families.