I'm back out to riverside in tulsa next week to build some hours before my ir. c-152 is about 40 an hour with no instructor, 172 is i believe about sixty and the duchess (multi, like your looking for) is only 100. as most multi's in this country are about 300 quid per hour you'll save money as you start your 3rd hour (as getting to tulsa is £400). Try calling their british owner on01992577707. If the number is edited out by the moderator, pm me.
winch, those fifteen hours would cost around 1500 in at rvs compared to almost 4500 here!