According to your other thread, the SUV still ran, it just didn’t have the power it is supposed to, and the check engine light was on. So the engine apparently still runs well enough to get you from point A to point B, without spending $7000+.
I looked online at the cost of a remanufactured turbo or a new aftermarket turbo, and the step-by-step instructions to replace it. You would need a lot of tools, and a good floor jack and set of jack stands. If you could do it yourself, you could buy the turbo for about $600 online, figure another $100 for gaskets, hoses, and incidentals. Even assuming the engine ingested metal particles and scratched up some of the cylinders, it might still run adequately if you replace the turbo, though it will probably burn a lot more oil as a result.
If a DIY turbo replacement is out of the question, it would not make sense to spend the money to have that done profesionally on a questionable engine. The turbo and gaskets/hoses/incidentals which would cost you less than $700 online would probably cost $1200 or more for parts alone at shop prices, plus another 6-7 hours of labor. It would not make sense to spend that much money to end up with an engine that will probably burn a lot of oil, and have a permanent check engine light on, even though it will probably perform adequately otherwise.
I would say that if you really like this vehicle, it might make sense to have a junkyard engine and remanufactured turbo (or new aftermarket turbo) installed by a reputable shop, assuming a decent warranty of course. Otherwise, it might be time to trade it in, or sell it on Craigslist as a “mechanic’s special” and put the proceeds toward something else. If this vehicle is worth $10,000 in running condition, you should certainly be able to get at least $2,000 as it sits.