How do I do a transfer of deed if I have three sons?

Ask a local probate attorney whether Illinois has a transfer on death deed and, if so, transfer the deed not to your son directly but to a trust which will allow him life time occupancy but, when he abandons the property, divide the proceeds ot any sale among him (or his estate) and your other two sons.  Note that (1) you must create a trust and have a trustee other than this son and (2) you may want to incorporate a special provision for any spouse or minor children who remain behind, whether because your son has died or because he has entered an assisted living or nursing facility.