But this invalidates your point of upfront or later cost. Electronics are a gamble at best.
If the replacement part is not available you're in the same boat. Isn't it. The sales people are of no use to you then.
Very important to get oem part and not some generic copy. What gets copied even more than non Chinese is Chinese and spoils the brand name.
And with these essential appliances the part needs to be there within a week max or you're looking at a new purchase regardless of brand. Distress purchase.
If only generic is available then think of it as a temp fix and use the time to get the real part.
But no way his dishes are going to come out 2-3x better cleaned. It might not even be a 10% difference.
There are other things than performance. This won't be apparent unless you have more experience.
Ease of use. More durable parts. Lower cost of repairing because of better design. Non existent problems due to better design. Parts available within a minimum time frame. These are all hit and miss depending on the model but on average you will be better off.
Did you had a chance to check the cleaned dishes from a Midea dishwasher?
I'm going with what some reviewers and repair people have said regarding cheaper Chinese brands. I've already posted what the good folks at uk whitegoods have said.
Midea is known to be oem to a number of other brands. Take Samsung. But the cost of the Samsung will be more than the equivalent Midea. Branding plays a part. But is there anything else? People will say oh but Samsung will have to approach midea for parts in the first place. True. But Samsung i think is more likely to have a spare available and someone who can fit it.