Equation
Lieutenant General
I think people keep forgetting Taiwan's budget is limited so it's not just about a wish list but about what can be realistically procured with maximum bang for the buck. Perry class purchase needs to be viewed in context of limited deterrent against PLAN until US reinforcements can arrive as well as deterrent against SEA neighbors Vietnam and Philippines as well as against Japan. Let's not forget Taiwan already has 8 Perry class. Cost of maintenance with this procurement would be the most value oriented because it won't require additional learning curves or stockpiling more parts. If they bought all 4, maybe they could even retire the Knox class as they are long in the tooth at this point, reducing op cost even further.
What about acquiring non-nuclear ballistic missiles for counter strikes as additional deterrence?
No ones going to sell Taiwan any ballistic missiles unless they want to risk losing good economic and trade relations with China, so ROC has to develop their own and their program is not very good.