I decipher your initial post as looking for confirmation that time and hours are the safest, essential, most prudent or whatever you want to call it determination to overhaul the prop.
You found it. You made a statement of “100% consensus”.
Get your concession from the seller based on the confirmed bias.
I have joined several on-line forums after I made a significant purchase to find out more about what I had done.
In my case, i made poor choices. I could have done better in finding a more suitable model, option or stayed away from known trouble spots.
Let my life be a lesson on what NOT to do.
Join the forum, get the details, do research, make better informed decisions.