I was out of town when your question came across on Trulia but I still wanted to answer. The nearest Costco from the property on Paint Drive is a few miles away as others have stated. It would probably take you around 20 minutes driving time to get from the property to the Costco. If you were to go South on Eagle Rd. to the interstate and then East on the interstate to the Cole Rd. exit you could avoid some of the traffic lights and stop signs. There is really not too much in Boise that is difficult to get to as opposed to other larger cities around us.
If you didn't want to go to Boise for the Costco, there is one not too much farther out in Nampa but it would take longer to get there even if you used the interstate.
If you would like further information on this property or other property and their proximity to the local Costcos, please let me know and I will get that information out to you.
Thank you for your time.