Treat the IMS bearing as a wear part and replace it with an upgraded unit after purchase. That will lower the chance of failure. If it does fail, there are used 2.5 & 2.7 engines for about $3k on eBay.
For a budget track day vehicle, I would go for a Miata, BMW 2002, BMW e30, BMW e36, '84-90 911, etc.
Nick
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