I have a small cordless one and plan to get a larger corded someday. Do you have any other cordless tools? Chances are if you have a drill already you can pick up a saw that uses the same battery or even a kit with a matching battery so you have a spare. Cordless stuff really becomes the most helpful when you have a few things all sharing the same battery so you only have to have one type of battery and one type of charger and can just swap tools on and off the batteries without plugging in and unplugging cords. For example I have two drills, a reciprocating saw, circular saw and flashlight all in one small box. I plug in one cord for the chargers somewhere out of the way and swap between drilling and sawing as needed. If its just going to be one job use a saw you may already have such as a jigsaw but if your doing this as a job where you may need to install more doors later then buy a cordless and put the chargers in your truck so when you have the small one or two door jobs you can just grab the saw, get the doors installed and go and not spend time unpacking and packing extension cords and such.