How hard is a measure that is impossible to tell. My last front end swap was on a 94 Pontiac. The frame lifted over the subframe. So you need an I beam, garage etc.
You have the physical parts engine, turbo, harness etc. You have have ECU. And likely the whole harness assembly that goes with that... then you have downtime. Your car will be in pieces for at least a week, possibly month, months, or year. It might never go back together. So you need a 2nd car already.
On top of all this. Noone will ever buy that car from you. You've taken an asset. And thrown a bunch of money into it. And dropped its value to scrap prices. People don't want a car that might have been pieced together..
Also there is the bank... if you don't own the car (payed off) the bank will not be happy you modifying their equipment like this.
TLDR: Is it possible? Absolutely. Cost? Out of this world.