Maybe it would be worth modifying the question to “Has anyone ever had to replace an engine in a car? How much did it cost? How about a transmission? What kind of car was it?”
I think that would provide you with the information you want and probably pass FlutherMuster.
I’ve priced engine replacement in an ‘86 escort and it was $2600. I’ve replaced an engine in a ‘96 Winstar, but it was used and I got the whole salvage for $900 plus about $500 labor.
Would it be worth your while to look for a salvage Lexus for that year?