What is your disposable fund position?!
if you may expect donations it may / may not happen as proposed
wherein animals need to survive.
why Desi Cow?
Goshala - basically - is to take care of animals which are sick, weak etc!
based on this formula - no need to start a Desi cow goshala and is possible
to farm as such as desi cows are usually Healthy.
If you are seriously intersted i can put you on to One expert, consultant,
a Vet', pan India presence, live in Mumbai, he shall ask you all these
questions, if you do not have authentic answers, if your posting is Impulsive,
well keep away from him.
give it a thought, think what it may take from you, what you may need to
givein.
Suggestion: Not to Jump.
This is a friendly gesture professionally.