Electric baseboard

[new land owner]

        I was in Home depot looking at baseboard heaters and they had a 110 volt portable unit.  Can anyone tell me if I go that route will it cost more to run this unit than to install a 240 volt baseboard?
        The unit was $140.00 for a 5' piece and once I buy the baseboard unit, the wire to run it, and the circuit breaker I would be close to the $140.00

[MountainDon]

Watts are watts, voltage does not matter to the electric meter. However, it does make a difference with the hardware; wire, breakers etc.  You didn't indicate the wattage, but with 12 gauge wire, 120 VAC you are limited to 20 amps or about 2400 watts per wire run from the 20 amp 120 VAC breaker.