A spray foam guy that was recommended to me just gave me a quote of $3400 for my new garage which includes:
~1200sq/ft of walls/ gable at 3.5 inches thick
~ 1800sq/ft of ceiling at 5.5 inches thick

I told him to come do it because I'm ready to get it done and he can do it next week. A little over a dollar a sq/ft seems pretty reasonable to me. I'm wondering how that aligns with what others have paid. This quote is for open cell foam BTW.

I had my new build and shop sprayed recently. I had open cell sprayed in the house walls and roof, and went with closed in the shop portion. We went 8" thick open cell in the house. Best I can figure they sprayed about 6000 sq. ft. for about $11,500. So about $2 per sq. ft. This was in the San Angelo area. Hope this is helpful.

I don't know the square feet, but I got old insulation removed, 2" closed cell foam insulation, and paint in my shop walls and ceiling, barndo ceiling, and porch ceiling for $13k last spring.

I paid $4600 for about 1700 sqft and associated peaks. You got a good price.

As the saying goes, sometimes you get what you pay for. If there is any wood product in your structure that Will get spray foam, they need to ensure it has total coverage. If there is even a small void where cold air can get to the wood, it can cause condensation and then degradation. Open cell foam will hold water against the wood. Closed cell foam doesn't hold water and has much better R value per inch (which is why its 2x the price of open cell).

Just make sure they are very diligent with the spray gun and don't leave any voids or open areas.

That seems a little cheap. I paid $8,245 earlier this year to spray a 40x50 with 16' eaves. 4" open cell on walls and 6" on the ceiling.

I've seen several people buy spray rigs and get into the business without really knowing what they're doing. Look for a reputable company that has been in it a while.

You have great taste in beer. I would say don't insulate, save the money, and put it into a trip to Treehouse.

This is great information. Interesting that in our boat construction we opt to use closed cell foam that is also impervious to gasoline degradation for required flotation requirements. It doesn't absorb water in case you end up with a crack in your hull or floor, etc and will prevent saturation of the foam by water in case of such. It also will not dissolve if exposed to gasoline in case of a fuel leak within your hull.
It's expensive and weighs more but besides adding flotation properties it adds lots of strength to the laminate and structure.
Some marine manufactures still use open cell because it weighs less and is much less expensive. But it can absorb water and will also basically dissolve if exposed to gasoline.
I didn't realize the same factors would apply to insulation as used in buildings. Makes a lot of sense for sure. Seems that I definitely would pay the extra money to use closed cell foam.
Thanks for sharing this info sir.