Gas vs electric heating

[Chetan Naik]

Hi everyone, I am a first time developer building a 12 unit apt complex, a mix of 1 and 2 bedroom apartments in Northeast ranging from 678 to 960 sq feet. My builder thinks the units are small and electric heating should not be an issue. I plan to submerged all the apartments and let the tenants pay for the utilities. Is this a good idea or should I press for gas heating? Thanks in advance and merry Christmas to all!