Dear Amit,
First I will make clear , Land Laws are very vast subject and complicated which can not be answered in such manner ,or without looking in details and documents etc. One main reason is that when India got Independence from British there were 550+ princely state in India . Every state had its some or other policy regarding land , After merger all land laws they started merging in one other, They started abollition of various land tennure, they brought agriculture tennancy law, they brought land celling law , they brought further restricition that you can not purchase tribal land, additionally present situation is that we need to check Regional Town Planning where the land is alloted , whether CRZ or not , forest land or not, various in detail analysis to prevent loosing your financial investment and to make proper investment. So your query can not be ans. in such simple way. You need to choose plot and then go for rigourous study of that title of land in detail systematically. So chances are that you won't be in trouble in future.
You said you are purchasing agriculture land, In Maharashtra non agriculture can not purchase agriculture land as per law there is restricition.
Maharashtra Tenancy and Agriculture land act 1948 no person can purchase agricultural land in Maharashtra if he is not a farmer.
Famous example who purchased agriculture land and latter had to give it or surrender free of cost was Amitab Bachan. So if you are not farmer don't investment in agriculture land.
But there is one solution or idea still if you want to purchase that land subject to other conditions mentioned above. Tell that person to make some deed that you has taken money from you for his personal need as loan. Tell him or you make the land Non - Agriculture. Once he /you succeed in making Non Agriculture land then you may think of purchasing it. You can make Memorendum of uderstanding with him but it does not have any legal sanction in court , that once it is NA land you will purchase it at specific price.
So this thing require legal expert while dealing, who is ready to take care of your own legal interest than other side .
If interested will enjoy studying about that lands title if you are interested to share :) Do get in touch with me personally