Balance the cost of the tubes against the shop charge.
I have taken the wheel off. Very easy to do. Removing the tyre, however, seems to be an insurmountable task! I think I am too light and puny to break the bead and fear the bead has broken me! I can't make a dent. I will try again tonight, otherwise it is being taken to the inner tube replacement man.
I think "emskee" is the replacement man!!