Long story short, I have to replace the engine. Is it worth it?

What is your question?

Either replace the motor, or sell the car as is. I have a mechanic friend that is going to replace it with a crate motor for $3,500-$4,000 its a new motor so it comes with a 100,000 mile/3-year warranty. Is this worth it? I'm $7k deep into this money pit due to unneeded suspension replacement trying to chase down a squeak that I never found, and also from rebuilding the transmission... Engine tick, thought it was timing chain tensioners. Then the tick jumped to the opposite side of the engine(it was on passenger front, now it's on driver rear, yes I can feel the tick with my hand). I did an oil change, and it has tons of metal flake in the oil. The motor only has 110,000 miles which is aggravating because these motors are supposed to be bulletproof. SO! idk what the tick is, but the metal in the oil shows that I need a new motor... or a whole rebuild.... Is this car worth another $4,000? (just to repeat, I've already replaced the transmission. So almost all of the major components of the car have been replaced.) I know I'll never even break even at this point with this car, but I don't know if it is worth keeping this car alive.