Why not run 220 volt to the machine? A roll of 10-2 wire with ground is not that expensive, add a beaker or two in the nearest existing panel. Use a 220 dryer or air conditioner receptacle in the wall. If the exterior service panel is near the room you could run some conduit up an outside wall into the room. If its not your house you could temporarily use an existing 110 outlet and change it to 220, pull the right wire to the existing outlet hole.
Regardless, you want to minimize the distance or length of cords to the machine and use quality 12 gauge HD extension cords if you have to. It probably would be cheaper to run romex though.
I use an exterior rated 10 guage cord through my attic to feed my 220 compressor. That stuff ain't cheap either, but I got it for free off an electrician friend. I just dropped it down from the ceiling to a wall mounted disconnect. Very thick black rubber jacket, looks like the same stuff my 50 amp RV cord is made from.
Regardless, you want to minimize the distance or length of cords to the machine and use quality 12 gauge HD extension cords if you have to. It probably would be cheaper to run romex though.
I use an exterior rated 10 guage cord through my attic to feed my 220 compressor. That stuff ain't cheap either, but I got it for free off an electrician friend. I just dropped it down from the ceiling to a wall mounted disconnect. Very thick black rubber jacket, looks like the same stuff my 50 amp RV cord is made from.