Reasonable near bombay airport means something on the order of 5..7K ++ INR. Poke around on cleartrip.com or makemytrip.com. Then look the hotel up on tripadvisor.com ..

Walk out of the airport and there's a prepaid taxi counter. You can get a regular taxi (non aircon old black fiat 1110 aka premier padmini) or an aircon taxi (aircon old blue fiat 1110, or maybe a tata indica / maruti suzuki 800)

If you see a tout hit on you ignore him .. he will go away and hit on someone else. They hit on foreigners far more than Indians and you sound Indian / south Indian with your FT handle, so ..

If at all you can do so, try to change your ticket so you fly direct into MAA - Air France if you want skyteam miles, or Lufthansa / BA / Jet Airways