Look at it this way: 50,000 words is approximately 200 pages (double-spaced, 12pt font).
So, 15 days would mean you'd need to write about an average of 13 pages per day.
Another way: If you set aside 4 hours per weekday and 8 hours per weekend day, that's 36 hours per week, or 72 hours to write the novel.
You'd need to write about 2 3/4 pages per hour, or, let's say, approximately a page every 20 minutes.
You could do that.
