NTSC monitor is a fancy name for a TV, with a few significant exceptions. First, they don't necessarily receive airwaves. It allows you to see what your video will actually look like on a video screen. The software interface will give you an image but it might be small, pixelated, or choppy on playback, depending on your configuration. You just need to get the right cables and adapters.
Video is counterintuitively an audio medium.
We are less forgiving of cracks and buzzes in the soundtrack than of sloppy images. Reliable audio monitors are essential, especially if you plan on doing any sort of stereo manipulations. Self-powered speakers are a great option. A less-expensive option is to use your home stereo system. RCA cables into your amplifier would do the trick.