Wife maintenance and alimony

I am central govt employee with 55000 in hand salary and having disputes with my wife on various topics we are living separate from last 6 months and my SaaS n sasur interfred in my marriage much that's why I think in future my non working wife with 1 yr child baby boy will take to court for alimony or maintaince in this I need guidelines as how much should i have to pay alimony or maintenance to wife n child if she moves to court? I have 2 acres ancestral land on joint name of my "brother and me" and 1 bhk flat in pune on my only name with market value of 30 lakhs ..hope you got all my details (my wife has not worked before this and she is post graduate with M.A. she never worked nor interested to work in future)..it's better to ask experts rather I am always doing Google search n calculations on this topic ..(also I have schizophrenia so I already told her before marriage but they people taken this lightly then but seriously now..so this mental illness Will help me in this case or should be hidden from court??))