Based on the screenshot of your culture above, your are getting 86K from buffs, but can only use 54K. so 32,000 in wasted buffs.
That would be 10 visits to your MH instead, totalling 1.2 million coins.
You should at least figure out which buildings would give you 50-60K in buffs, and ask your FS to only buff those and to switch to your MH if they are already buffed.