Yes you could give the handyman your login info (trust the guy?) and
he/she could do the initial setup. Then you can control remotely from
then on, as long as the Nest keeps connection with that wifi.
OK @marcusvictoriou @someguysNEST I'm in same situation. Just had
handyman set up new Nest Learning thermostat in my moms house on East
Coast, and I'm here on West Coast. I guess i sorta understand the
initial setup has to be on the same wifi network...