It wasn't a windfall but the result of a number of years of making good decisions with careers and some luck that allowed my wife and I to buy a farm. We were in our 30s at the time. The farm is 158 acres in Virginia and we live on it. It is almost a 1 hour commute to work for each of us. It is mostly woods with 50 acres of open land (usually corn). A local farmer pays us $100/acre annually for the field ($5,000/year income).
Early on I made food plots (10 of them at 1/2 acre each), enrolled some land in CRP programs, and built a pond. This resulted in a lot of work, especially for the food plots that I was happy to do. When I was in my 30s I loved the work. I was planting trees (sawtooth oaks, Dustan chestnuts, pears, crabapples, you name it). I loved seeing the results and the wildlife flourished. The deer numbers doubled or tripled in the first couple of years. Taking 4-6 deer per year with a recurve became typical after a couple of years.
Shortly after buying the farm I took my first elk trip. It started innocently enough with a short trip and almost killing an elk. Then the next year I took a longer trip and killed a 5x5 bull with a recurve at 15 yards. From there it only got worse. I'm so glad that the people on Rokslide won't judge me for this but I was on my way toward a full blown elk addiction.
Now almost 20 years later the food plots have grown over in weeds because I quit taking the time. I now draw 2-3 tags so that I can hunt 4-6 weeks each year in the western states. In order to help fund the elk addiction I lease out hunting rights on my own farm, which pays for most of my western hunting.
I never anticipated my elk hunting addiction. I certainly never anticipated leasing out hunting rights on my own land. But here I am. In 20 years my knees won't let me hunt elk any more so probably I'll switch back to deer in Virginia.
I'm not sure if this will help your friend decide what to do with his new money. But I would offer this up:
If he is the "homebody" type then he will probably benefit from owning his own hunting land.
If he is the "adventurous" type then he will probably prefer western hunting.
Or, he could do a blend of both if he has the will.