Hi Rhi,
I'm taking a slightly different tack here! Firstly, I'd be picking up every day. Mine never go in the same spot twice, and also hate the wet grass. Smell will seap into the concrete, and when they smell, they go, hence the repeat performances on the concrete near the door. "Delete" will take the smell away. Don't use amonia based products as this only encourages them.
Your dogs poop will be proportionate to how much he eats. If you buy a supermarket brand of dogfood, they have more "fillers" in them, so the fillers just make their way out of the dog in the same amounts they went in.
If you buy a premium complete dry dogfood, (Hills, Iaams, Ekanuba etc) they have more nutrition per meal, so the output is less, and the smell (whilst never pleasant) will be much more tolerable than if fed on canned foods.
Now before you say - its too expensive, please bear in mind that your dog will require less food in the first place, as practically all of it will be digested and absorbed. It costs about 40 cents extra per day for a premium food from the vets, or stockfeeds place. When I switched from supermarket food to premium food, the output was halved!! A definite bonus in my book!