Asking share on income from rent before partition

I am having 5 sisters,all married and setteled, my father is having a 2 workshop, I joined him since I was 13 year old and later I handled one workshop independently, I invested lakhs of rupees in that premise as I was there , now due to crunch in business ,I decided to give it for rent and now I am occupied in dad workshop as he is unable to work and I don't want to loose the business we are having right now The income which I get from rent is used for house expence .As there is income from rent my sister's want the share from that rent income ( there is no partition or will made yet by my dad ) My question is .... 1) Does my sisters have equal right in the workshop? 2) m I liable to give the share from the rental income to all 5 sister even though partition is not done ? 3) workshop is my source of income and giving them share mean I have to shut down by business as I don't have a capacity to own new premises to run my workshop.my family will suffer. 4) I am living with my parents at its owned by my father.he is 81 years old and mom is 70 ,I take care of them , do I have to vacate the house after their death ? The will is not yet made, kindly advice