The tricky part about your question is that I apply manure based on quality of the soil.  In poor soil that I'm just bringing into cultivation, I may lay down as much as two inches of manure over the entire area.  In this case, I'm applying manure both to provide nutrients (especially nitrogen) and to increase the organic matter levels of the soil, improving the poor ground.  Plus, the high levels of manure jump-start the soil life and get everything humming fast.

On the other hand, much of our garden is now getting to the stage where the soil simply needs to be topped up with nutrients before each planting.  There, I often apply one to two five-gallon buckets of manure per garden bed (about 20 square feet), which would work out to about 11,000 to 22,000 gallons of manure per acre of ground (assuming no unplanted aisles).  That's about 55 to 110 cubic yards of manure per planted acre, or a layer approximately 0.4 to 0.8 inches deep spread across the planting area.  At this application level, you're only maintaining soil nutrients and organic matter, not improving your ground, so you'll want to add cover crops into your rotation to ensure you're still making your earth richer.

Anyway, to get back to the point and to actually answer your question, I estimate that we use about 200 to 250 buckets of manure per year for our vegetables and strawberries.  We also add a few buckets to our bigger perennials, but most of our bushes, vines, and trees get their fertility from the deep bedding in the chicken coops and (starting this fall) from our composting toilet.

Last year, we went through 107 bales of straw, which felt a bit extravagant but which allowed me to use straw as bedding in the coops when I ran out of leaves and also gave me straw to mulch a few of the perennials.  Since our vegetable garden is only about a quarter of an acre, your friend's statistics sounds about right (although I assume he meant straw, not hay).

In case you're curious, our manure costs us nothing but sweat equity and gas for hauling, while our straw costs us a bit over $5 per bale from a local farmer.  You can see my rundown on the other costs of our garden here.

Gardening or farming organically definitely does use a lot of inputs!  Of course, we could turn the whole thing into a closed loop pretty easily if we just had another 24 hours in every day and another ten arable acres to grow grains for straw and cows for manure.  In the meantime, we'll keep bringing in manure and straw to keep our little two-acre growing area feeding us a large proportion of our own food.