Hey Christopher,
So P3D is GPU intensive, My last build; AMD Ryzen 3600 and RTX-2070 Super ran at High settings. My current build with an AMD Ryzen 5950X and RTX 3090 can run at Ultra Settings. MFS2020 on the other hand is CPU intensive.
CPU bottle neck will be an issue if you are expecting High settings with a 1060 6GB, but on the bright side, if you can afford to hold out a little longer GPU prices will come down... I wouldn't suggest dropping 2K on a 3090, but getting yourself a 2060 or 2070 is feasible. Average is $550 on ebay and should do you some good. Just inspect the card before you give over any cash. Even mining rig GPU's will work, and because of the changes happening here pretty soon, you will see an influx of those hitting the market sooner than later. Again inspect these cards. Make sure they are clean and free of dust. And before anyone says that GPU used for Mining are degraded units, studies have shown that mining cards (as long as they haven't been abused,) loose no more performance than that of a brand new card. Wish you well in your upgrade endeavor.