Perfect large cheap older shoal draft boat?

I'm looking for a short list of larger cheap fixable neat sensible fiberglass shoal draft boat.something with a pocket keel or a retractable keel.fiberglass.i.prefer a well rounded boat not a skinny Pete.
But run in very shallow water.
Prefer a pilot house but can build my own.prefer a rear pilot erea.with roomy roomy space.but cheap...so old boats along the east coast of USA prefer florida.must have small diesel.but years ago I wanted to do this so I looked at boats and I learned something.i was a roomy appeasing boat not a mass produced compromise that will never make me happy.
Cheap as in I'm selling a acre in east Tennessee and loosing huge money on it but for $15,000 I'm chipping some off my price for this boat I've just described.so i can use my skills in Mechanic's and fiberglass to make it work for me.
My goal: sell my fishing product touring the inlets of east coast florida.and in-between.prefer a 40-50+ so if anyone has a specific name of boat or just seen a old shell they remember please feel free to Intertainment my curiosity.
I saw a boat on YouTube a couple recently don't it was aluminum.but it was a fascinating flat bottom with a retractable keel.i wouldn't mind modifying a larger boat to make a retractable pocket keel.
Also a junk might Intrest me.but I'm not a sailboat owner( ever)but I know I prefer a regular sailboat sail design.could a person blend the two?a junk rig hull and a modern sailboat upper works?
Best regards.