When Will I Finish

This is supposed to be a vest for one of my girls, however I think it's going to be summer before I see this finished. I found this vintage pattern and felt that a mish mash of stripes would make it cute, but I feel like I've been knitting this for weeks. Why am I so SLOW, it's only plain knitting. I must try and get at least the front finished, then the back should be simple.