It might be advantageous to have 2 people, so you can use the phrase "I need to talk to my spouse" when you deal with contractors, tenants or anyone who you don't want to give the answer right away. But you can use the phrase even if only one is on the deed. Another advantage of having both on the deed, is if one of you dies, the other becomes automatically the owner, might be less paperwork (depending on your state) for the surviving owner to sell the property. Or in case one of you is the owner and also becomes incapable to give a concent to sell the property, the other one doesn't need to wait for the "incapable" to die in order to sell. But it also depends on your state laws. Maybe get consultation from an estate lawyer.