I'm hoping this will be the last home we buy, so we plan to live in it for a long time. We got a quote for spray foam today. It came in at $7,200.
As mentioned above..you can get very technical with insulation and the many types available. Some can be easy fixes as I mentioned or with the new PIR can get a little spendy..Your spray foam cost is within the norm.
With spray foam you will be happy in the end knowing your home is well insulated. If you go through with this..make sure all wiring, plumbing and all wall penatrations are complete before insulating. Your contractor will double check this before he does any work.
What ever you decide...your well insulated home will have a plus if you ever decide to sell.