Partition case filed against me,to create problems

Hello,my father died in the year 2013,and I have two younger sisters and my mother. Even though I agreed to all their terms to divide the property as per their will and wish ( as my father did not write a will) still they are pressuring me to give up more of my share(i.e 25%) so that I will incur a loss on my part! Both my younger sister and my mother are against me as they want to create problems for my sons educational financial need! As I m in need of financial loan on my father's property in about 5 years time,they are trying their level best to make sure that none of my fathers property can be registered to my name,so that I can't be able to take a loan against them! Their main aim is to delay this case for at least 5 years so that they can demolish my sons future and mine! I m a poor man and I can't afford much money in terms of courts and lawyers! Knowing this weakness they are pressuring me,to give up more of my 25% share in my fathers property! I know that legal matters take time,but is it possible to resolve this partition case in less than 5 years? There is also a house as an ancestral property! Is there any chance that I can take a loan against this without my sisters and mother's permission? I have no assets of my own! Please suggest?