The prop is like the transmission and tires and air ride suspension all in one. It makes a HUGE difference in how the boat works and to a degree, the fuel economy.
See if you can borrow props or rent or buy the cheaper aluminum ones to start. I have a Solas Amita 4 blade stern lifter. I went down in pitch and up in diameter. And up in speed and up in acceleration. All for ~$110. The prop I started with is my backup prop.
I bet a little stern lift on a 4 blade, maybe down in pitch a bit, would work wonders.
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