My question: would there be any tax benefit to this plan?
Not really. In fact, itās probably creating more tax issues for you.
I assume that I would be able to deduct the mortgage, condo fee, RE taxes from the rent received.
Your assumption is incorrect. When you purchase a property and rent it to a friend or family member for below market rent, itās considered personal use, not an investment property. So those expenses are not deductible as rental expenses. You would still need to declare the rental income. Per IRS Pub 527:
What is a day of personal use? A day of personal use of a dwelling unit is any day that the unit is used by any of the following persons.
.
.
2. A member of your family or a member of the family of any other person who owns an interest in it, unless the family member uses the dwelling unit as his or her main home and pays a fair rental price. Family includes only your spouse, brothers and sisters, half brothers and half sisters, ancestors (parents, grandparents, etc.), and lineal descendants (children, grandchildren, etc.).
.
.
4. Anyone at less than a fair rental price.
While you didnāt specify who the family member was, in any case, since you would be renting for less than a market rate, itās still personal use.
Then you get to the part of Pub 527 where it talks about deducting rental expenses:
Not used as a home. If you use a dwelling unit for personal purposes, but not as a home, report all the rental income in your income. Because you used the dwelling unit for personal purposes, you must divide your expenses between the rental use and the personal use as described earlier in this chapter under Dividing Expenses. The expenses for personal use arenāt deductible as rental expenses.
Since 100% of the use of the property would be considered personal under the scenario you described, 100% of the expenses would be personal, and therefore, not deductible as rental expenses.
I would strongly suggest that you consult a tax professional before making any purchase with the intent of renting it at a below market rate. Under current law, as a second home, you may be able to deduct the mortgage interest and property taxes on Schedule A (subject to the SALT limit on property taxes). The condo fee and cost of insurance would not be deductible.
AJ