It is better to register the WILL.
Registered WILL may not be set aside on the counts of authenticity.
Registered WILL can also be consented and may land in probate court..
In presidential towns it is mandatory to probate the WILL.
You may inquire the charges.
Gift deed is another option.
The charges in blood relation are negligible.
Once you are owner you can go for eviction.
Weigh all pros and cons and choose wisely.
A very able counsel can help you.