We have been using a grain cart since 1974.Back in the 70's we had a matched system,single axle 300-350 bu. grain trucks,375 bu. dumping pits, a truck scale, and Shivvers in bin dryers to match. At that point I prefered to unload on the go directly onto the trucks. Highly efficient and most of the time only required one driver. Today with larger and larger combines that doesn't work at all. Combnes can do 2500 bu_hr. thats faster than most augers or onfarm legs can elevate it and surely faster than the on farm dryers can dry it. My guess is that in the future you and your wife will be doing the combining, unloading on the go (which increases combine capacity 25-35%) into a 850-950 bu grain cart w_o a scale, and having large trucks or trucks and pups hauling the grain. The country side seems to be overrun with semi's on farms in recent years.We had a scale on the grain cart, but forget that. A GPS yield monitor is far more accurate and reliable and gives you much more reliable data. You probably won't need to get a largermuch more expensive combine. The large grain cart has the advange and flexibility, especially since you use it when unloading the bins. Having a grain cart that will hold a semi load is ideal. My choice of grain carts is the J and M. It is simple, reasonably priced and the large auger folds across the front. The only way to have it.Good luck!