Has anyone fully upgraded Mother Base and the required FOB? I just kind of thought about and makes me wonder if this game might be a little too grindy. I have left my game running for no joke about 5 days straight now, maybe longer. Steam says I have played the game over 230 hours. I do this so I can process resources, I farmed mission 21 for Fuel since that is the most valuable resource in the game as far as I can tell. I'm constantly doing the combat missions and side-ops for GMP, and I focused my MB upgrades on Base Development and R&D first so I could have maximum efficiency in processing Fuel and researching items.
With all that, with an almost entirely A+ staff of base development and with almost always have a large reserve of unprocessed fuel so I can have maximum output of processed fuel. And leaving the game running for days on end, I still don't have enough Fuel to buy all the motherbase upgrades. I would say at this pace I would need another 200+ hours to fully upgrade my MB and the free FOB you get.
So ... has anyone fully upgraded MB and the 1st FOB? Should I just focus on beating the game because you find a ton of actual processed Fuel? I'm always running around and picking up the 100x boxes of processed, I have put a large amount of time into the missions, side ops and just free-roam going from checkpoint to outpost to get re-spawned processed fuel.