Your costing is about right. You might find someone a few dollars less or more. BUT, the key thing is get a very reputable place to do it. There are lots small shops out there who might not do as correct a job, or stand behind the work.
Last counsel: highly recommend you not do bikini lines across bonnet. Have the material cover whole thing. You will constantly battle the collection of wax buildup on that line...and it shows.
And you have to be a bit more careful in wiping and washing knowing you have a wide line across that can easily catch on car polishing times.
Covering whole bonnet makes it virtually invisible. Whole front yes, and yes mirrors. They take a chip beating as well...not to mention severe bugs etc. If you can afford the partial, then pop for whole hood being done. Justsome thots that might work better.
