The ultimate money pit! Three daughters in college at seaside campuses over the last decade.
Ultimately paying off though.
Car-wise, no really deep pits, but trying to make a solid roller cam work in an FE back in 2003-2005 did allow me to corner the market on bronze distributor gears until I went to a regular ol mucho muy goodo flat tappet. Boghosian, my engine builder who flat warned me against the solid roller cam, still has the last one we pulled from the motor sitting on his shelf by the front counter just to remind me never to doubt his advice.
Never will again.