We have had two simple repairable punctures in the last 3 years, had to resort to foam both times. Two new tyres in both cases.
Now with the caravan I have gone on Ebay and got a 2nd hand Alloy for our Seat Altea, £60 inc delivery, money well spent.
Might be of interest, I bought a Ring two cylinder air pump from Screw Fix, easily copes with the high pressures for Caravans and Motorhomes, does the car in seconds!