In the past, my clients who have purchased homes with a child on the purchase and title, have been able to claim their property tax exemption. Is this your question? Please ask your tax advisor this question and others you have about this aquisition. A tax specialist is the only one who can properly answer these questions.
Double check with auditior but if its his primary residence I believe he can file homestead exemption so long as he doesn't have homestead exemption filed on another property in Indiana. Regarding your other question, I recommend you consult a tax professional/CPA.
Will both your names be on the mortgage? Not sure what you mean by him paying higher taxes, what kind of taxes? If he is the sole owner on the deed, and you pass, he should not have to pay estate tax. I would suggest you consult an attorney who versed in estate law.
The Homes.com Questions and Answers Community offers a great opportunity for Indiana real estate professionals to connect with the public. Consumers looking for an apartment for rent or homes for sale in Indiana can reach out for answers to their questions. By offering answers, Indiana real estate agents and other professionals can demonstrate value and build credibility. Registered users can even set alerts for local coverage areas in order to be contacted when questions are posted in areas of choice.