what Polish industry can achieve
Naval industry is appalling, but other branches are not that bad - we make good modern howitzers (Krab), afvs (Borsuk) or manpads, and the deal with Korea includes licence to produce K2PL version of their main battle tank; most of the Chunmoo launchers will be mounted on Polish Jelcz trucks and integrated with Polish Topaz fire control system. So, our industry will make their buck. Also, Stalowa Wola has their full production capacity for Krabs reserved up until 2027, and new orders will be coming.
I wouldn't worry about Polish army, if I were you, Bobi. If Russia ever decides to invade Poland, she will face a force much stronger than what you are currently dealing with in Ukraine (and a NATO member, so help from the outside would also be incomparably larger). It's a question of costs really - even if we spend 10% of GDP for all this stuff every year for the next 10 years, it's still way cheaper than being invaded and occupied.
Also, I wouldn't worry about Poles collapsing under shortages of "butter". We are a nation well used to scarcity and crises, we've been through all kinds of sh*t throughout our history. These days, it's probably the best period ever in Polish history when it comes to wealth and consumption levels - we are getting too "fat", some diet and exercise is more than welcome. :)
What I
would worry about though if I were you, is your Chinese "friends". Let me put it this way, when you're taking a shower together and your soap happens to fall on the floor - don't bend over to pick it up with China behind you. :)
are Poles happy to provide employment in Alabama and Kansas, and generally feed the American military-industrial complex
Sure. If we are a valuable and reliable source of dollars for them, they will help us defend ourselves when the sh*t hits the fan. It's rather difficult to abandon an ally who showers you with billions of bucks and creates thousands of workplaces for your population. Freedom has a price and it's usually quite high.
phantom threat of Russian invasion
You started a full-scale war in Europe because of a phantom threat of NATO invasion; why can't we spend some cash because of a phantom threat of Russian invasion? Especially that spending this cash and creating the strongest land army in Europe will make that invasion even more phantom.