Another mere 2 million g will get you the super-portable, fits in your pack farm obelisk known as the Return Sceptre which is generally accepted by me as the primary point of the game. Now you can instantaneously return to your Farmhouse door with a scheaooooowwwwwnnnn-filled flourish from absolutely anywhere on the map, whether you be at Level 300 of Skull Cavern, at the bottom of the sea on a Deep Sea Fishing Expedition, noodling around in the spa with who knows who, or from 3 whole and entire steps away from the aforementioned Farmhouse door.
The solution is yours, but the g may not be just as yet. Trust me, it's worth the grind.