Two units rented on one lease

[Jason C.]

I have a small duplex that we renovated and have one family wishing to rent both sides. They meet all screening qualifications and I gave them a speech about how it has to remain two units (i.e. no knocking down of walls to make it one place, etc) but I was wondering if I should sign one lease with both units listed, or have them sign the lease twice, once for each unit of the duplex? Any benefit to going one way or the other?