We did it back in August, when my friend bought a new City and Careem didn't have economy class. I know times have changed now but here are some of the observations we had when punching these numbers:
- You will have days when your drivers are sick/away and can't meet the daily quota
- You might have accidents etc. that may prevent the car from being on the road for a week or so
- Your drivers may quit altogether and it might be a few weeks until you can find a replacement etc
- Uber/A-Taxi and more competition will always be there to take a cut in your pie
- PTI dharnas can and will affect mobility some days
So the lowest average we measured was based on assuming all of the above affect your annual income, with some months being over 50k and others barely hitting 20k.
Also note that no driver is going to work 15 hours a day for you indefinitely, you will need two drivers for that, or have a fresh supply of new drivers every 3-6 months, which will affect your profitability and costs.
Lastly, as far as rolla goes, yes the depreciation is barely 2 lac at most, but rolla rolls out a new model every 5-6 years, compare the prices of a 2011 GLi (13-14 lac) to a 2016 GLi (19-20 lac), the gap gets even wider. If/When the new city comes out in 2018/19, it'll be jacked up to 17/18 lac basic as well, and the cost to upgrade a 2014 to 2019 will still be 4-5 lac.
This can be avoided however if you plan to run the car for 10 years, which I think Careem now allows but then you'll need 6-10 lac to upgrade your car. All things considered however, your average monthly pocket won't exceed 50k in my opinion in a very optimistic scenario.
Edit: Afterthought, take depreciation as inflation adjustment as well as depreciation, which makes more sense. The math remains the same.
