Upgrade duplex to central heating and air vs. baseboard heat?

We recently purchased a duplex and are "house-hacking." There is currently a single window AC unit per side and baseboard heat throughout, however, the units are metered seperately and tenants are responsible for their electric. We have the intentions of keeping this duplex long-term as it is the start of our real estate investments, but want to know whether it is a wise investment to upgrade to central heating and air in Ohio given that we will have to run two sepearte systems and all duct work in addition to upgrading the electric box. Will this pay off in the long run? Will it be a better payoff and attract tenants?