While our cow is feeding her baby we'll get about a gallon of milk a day. That's 2500 calories. There's three times as much once it's eating grass instead of nursing but lets use the low levels to make it easy.(especially since any over production we don't can or turn into butter or something will just go to the pig) That's about 675 calories
The hens will be laying about 6 eggs a day. That's about 470 calories. We could easily add more hens but 6 was the number we have been talking about.
I plan to eat about two chickens a month so that won't really affect the calorie count too much but for accuracy, it winds up being about 80 calories per day.
The fruits and vegetables are really hard to calculate since different things are available at different times of year and a bunch will be processed into jars for later. So lets just say at least two apples, two cups strawberries, a cup of cherry tomatoes, a cup of salsa, a zucchinni, 2 cups of salad greens, a cup of snow peas, handful(half cup) of hazelnuts, and two potatoes a day. There will be much more fruit and veggies of high calorie and vitamin contents like squash, those are just a few random veggies easily eaten by two people in one day and the total is about 1199 calories.
Milk 2500 + eggs 470 + chicken 80 + veggies 1199 = 4249!
That's almost enough for both of us and it doesn't count anything we'd be buying instead of growing like salad dressing, pasta, rice, or sugar.
I'll admit I was worried but colour me content. This is highly doable.