Help finding projector

I've been asked to do a complicated portrait of my friend's three beautiful daughters. The youngest died tragically. The photo is beyond my drawing skills. I made an enlargement print and want to project the image onto the canvas so I can paint it. That's all I want to do. Everything out there is so complicated, expensive and more than I need. I don't want complicated software. Does anyone know of a product you've used for this purpose?