A whole lot of speculation and very few facts to be had here.
First, over $1000 of this is tires. If anyone has shopped tires lately, getting all 4 done for that price seems reasonable.
Second, the estimate only mentions the vehicle is overheating. Not from where, or what is leaking. Others have jumped in and stated well duh it obviously this or that... after seeing that the estimate is for the upper radiator hose replacement. We have no way of knowing was it that easy? Or did they have to run a pressure test, etc... to diagnose. That being said, most shops I have used charge the diagnostic if I don't do the follow on repair, which is fair. In this case, its 5% of the bill....
It would be nice to see a parts and labor breakdown to see where the dollars are going...
All in all for whats being done, the dollar amount isnt that surprising.