Engine swap for Nissan Altima 2.5 MT. Coupe

Frequent some Nissan forums. Replacing an engine with a like kind is difficult enough if you have never done it before. But installing another one not meant for the vehicle, requires all custom work, planning and research. More parts than the engine, like transmission, wiring harness's ECM, etc. The bottom line is how much money do you have? Replacing an engine of the same kind and size meant for your vehicle is a few thousand, replacing with a different one, figure $5k to $10K. I personally wouldn't put that much money into a 10 year old Altima.