200 acres should not take 4 hours. It should be coverable within 20-25 minutes with 75-65 overlap, flying height 120m with something like Mavic 3 getting a GSD of 3.5cm/px. Look at optimizing your flight overlaps and height.
The 4 hours is an overestimate, it's probably genuinely closer to 3 hours flight time.
So there's at least a reason to get out each winter (snow load), spring (melt/brush growth/flowers), and summer/fall (stream health/identify trees once brush loses leaves).
I also like seeing if there's trees in stands dying at an unusual rate, which might indicate pine beetle infestations or sickness that I'd need to take care of.
Also, it's a fun hobby and a cool dataset to flip through.