Worth swapping engines?

I’m only 17 and work fast food. I own a 2008 Mazdaspeed3 but it spun a rod bearing. I love this car to death, I don’t think I ever want to buy a different one.. do y’all think my specific car is worth swapping engines for, or should I just look for a new speed3?

Cons: Spun bearing (of course) Exhaust flanges totally gone and rusted out (rattles insanely loud at idle and squeeks) Building alot of rust in the bottom rear (previous owner replaced bottom front, no rust) Also has rust spot on the rear right fender Had 5 owners at this point Roof has very scratched up paint, not visible unless looked at closely When a lot of weight is in back the rear right fender will scrape against tire (2-3 people) insanely much (is lowered)

Pros: 127K miles, thousands worth of aftermarket goodies, interior is quite literally MINT, exterior looks amazing, its been very reliable giving me no issues, transmission is mint, high interest when trying to sell even with rod knock, been loving this car way too much, low mileage

I really don’t want to sell this car, but I’m right in the middle of deciding between an engine swap and buying a new one… but money is tight, i only have enough for a new jdm engine..