MBAustin, AMEN! Don't assume your kids will be delighted to receive (what you perceive to be) a valuable gift.
You name it, it happened to me: I had one of dad's tenants try to sneak into dad's intensive care room (by telling the nurse he was my brother) to sign a "release", thus gifting the house to the tenant. The one good payer we had passed away, leaving his wife with no life insurance and a mortgage. She is a nursing assistant at a retirement home. And one guy moved in with the sole purpose of suing me to try to steal the house from me. That was HIS retirement plan. Thank heaven the judge saw it differently. That only cost me $22,000 in legal fees, and he left the house in shambles. I sold it for pennies on the dollar.
So again, have an exit strategy. Your kids may not live near the properties, and even if they do, they may have absolutely no interest in trying to fill your landlord shoes.