I think it can be done for around this price, but it will be on the edge.

Turkey is a cheap country. November is very much low season.

Airfare is ca. $500, with discounting potential for a group.

4* Hotels are not the same standard as the USA and can start from $30 with breakfast - which will be a cold buffet of cheese, bread, tomatoes, cucumber, etc. Hotels will be cheaper outside of Istanbul and cheaper with a group booking. Note, they do not name accommodation.

Bus travel is cheap and chartering a bus for a week will not be expensive. There is a LOT of time on this bus!

A local guide, who may be called on to do all the tours will cost maybe $500 for the week (plus tips from those generous Americans)

So, the advertised programme could be delivered for a profit. Just don't expect to stay in the top name hotels and to be enjoying expensive fish dinners by the sea.