i think you dad can go to MALPOT karyalay and get a copy of Map and i guess you had you document made when you were processing your visa and might had made a copy of lalpurja to auditi you propertie and income. you do not have to have lalpurja if your parents explain the situation and apply for the loan they might be able to help and they will handover the loan to the person with larlpurja and keep to themselves till you pay the loan. Tell your parents to ask him to give the photo copy of lalapurja stating your dad own that house and land on it.
If you look for the options you will see it, thinking about selling stuff you had is just like " hitting you leg with  an axe" so thinking
There is a way to solve the problems, we have to look for it. Problems will ber big if you look for it but it will be nothing if you look for the solution. I am talking this things as per my experience in my case it was little harsh than your situation.
Tell them to get help from someone who can help and promise that person to pay some amount after the work is done. people will do things when they are promised to pay. instead of sending money now you can send that money to pay the person who helped you to overcome the problems. So leave you stuff as it is. 
Have a blessed day
SN