Secondary USB Camera on Pi 3 A+

Hi everyone! I’ve gotten the CSI camera on my Pi 3 Model A+ to work very well, however, I would like to add a second camera. The Model A+ only has a single USB output which I’m using for an Asus 56 wifi card. I’m wondering if using a USB hub is a good or bad idea. I’d assume it may draw too much power, so modifying a powered USB hub may be a better option. However, I’m not sure if this all is even a good idea. Would there be an option to use a HDMI camera as a secondary camera? I couldn’t find much info on that on the website.