You want to buy it and buy it anyway, no one will forbid you to spend your money on the forum as you like, but do not compare the V-6 from Japan from those years with German - in my opinion the difference was very large, especially in reliability.
To sum up 2.4, the average engine, not without flaws (frequent leaks, ignition system failures), relatively complicated ("multi-valve" did not give anything except production costs and complications, just like the twin spins alpha). Advantages: suitable for LPG, relatively high work culture (like most V-6s) a slightly higher torque (achieved at lower revolutions) than similar R4 units, ease of access to used parts, because new and original ones are not as cheap as that it might seem. European engines have power on the shaft, and Japanese (certainly on the US market) power on wheels and hence the impression and real performance of cars with engines of the same power and mass of cars on the plus for the Far East.
The WV group from popular petrol engines except outdated but durable 1.6 and 2.0 8V engines had one successful one: the 1.8T mentioned, the rest of them were quickly verified by the reality of duds.
In addition, when you decide on audi you buy a car older by 5 years than other brands with a mileage probably 100kkm and even more, because the countrymen buy this brand in the dark with eyes closed, in the evening at gas stations in the light of the "soda" - I have seen more than once.
Asking about the costs of exploitation I personally would not take an 18-year-old car, being able to buy 12 years for this price, and what is different to the majority of German compatriots, and practicing - I miss the "German" for years with a wide arc .
Buddy had once C4 with 2.8 30V 193KM, and the cost of original candles, WN coil, coils were huge for this time (I know, because then we exchanged comprehensively the entire "ignition", as then I had the "invention" sigma 3.0 12V 177HP to my everything was 3 x cheaper.
Both cars in the estate, but the Mitsubishi surprisingly got better despite 16KM less power and 18 valves less.