It is possible to set up portable operations up to 175; from the nearest mains.
I found I can replace the 20' of #14 power cord that comes on the Home Depot cord reel with 175' of #18. Rated at 10 Amps the reel can still carry plenty of power the distance if precautions are followed and it can still fit under the car seat if needed. See details about 50% down my Emergency power web page http://aprs.org/FrankenVolt.html and join our emergency power discussion group on [email protected] .
I'm giving these 175' reels and a 1 kW inverter to my kids for Xmas for backup power. My son's Chevy-Bolt EV can remote power his apartment if the grid goes down for over 64 hours from its large battery. My daughter's Prius Plugin-hybrid can provide power for days to a week depending on gas in the tank.
Similar to info in my ARRL Pub on emergency power: http://aprs.org/Energy-Choices.html
CAUTION: Such emergency uses are not NEC or UL approved Bob, WB4APR