Pumpset electricity bill-'HOW TO' for rented houses?

Day by day energy(petrol, electricity) related bill per month are increasing in huge amount.Every one is trying to reduce the power consumption as well as very cautious about the energy bills. 

Many people are  staying in rented houses and many people are giving there houses for rent.Now each rented house also has an electricity meter, however,owner and renters needed to share common pump set and  share electricity bill at the end of the month. Many times, the renters may be single(like me...!) or big families. Hence, it is difficult to calculate who used more water or(indirectly) who used more electricity.

My colleague Chetu (Chetan G) had trouble in renting his house in his native  with a single water pump. "Venky, namamaneyaga water pump set problem ide...enadru madala...!". The problem given by chetu is exciting one. 

After scratching my head for few hours, I came up with control circuit which can share the single water pump and directly energy consumption is recorded in respective meter of the house/rented rooms. The overview of the system is shown in below image:

I need few components, which related to mechanical assemblies, looking forward from some dealers in Bangalore.The microelectronics components are very costly in udupi and many of them are not available here.

I hope, I will be able to release the complete system as simple product for every house hold where everyone share the same water pump without fighting for electricity bill.

I thank our Chetu for bringing such problem in front of me.