Plane rental is expensive.
Most of the airspace is restricted.
Not sure for IFR, but VFR traffic is restricted flying into Dubai during certain time periods.
Its also really hot during summer.
You will require security clearance, which requires a residence visa
Your license will need to be validated, which requires you to write air-law. Very difficult to get the air law syllabus.
I am planning in doing half my hour building in SA and the other half in the U.S., more to see and a whole lot friendlier
If you still want to try:
Fujairah Aviation Academy, They have C172S's and a DA20 and DA60.
Umm al Quain Flying Club, have C172 not sure if its the R or S model.