I have a 14x16 and I can attest that this would be the smallest that I would go. Especially if it is snowing outside.
For one person, it's too much. I don't take it when I hunt solo.
2 people is very roomy, but nice. Plenty of room for xl cots, kitchen and chairs.
3 is perfect. No wasted space with kitchen inside.
If I was made of money, I'd go with a 12x14 with a cook shack. That way you can have options to expand.