Well, dogzRbarkin.... you are a complex person.

Statins do cause neuropathy.
NSAIDs do cause heart attacks, in addition to bleeding episodes.

And nitro sublingual expires quickly in the bottle. Once it is opened 6mos tops. If unopened ... one year. So if your nitro is not fresh, it is most likely evaporated away. (nitro leaves the tablets and turns into a gas). Taking ibuprofen with any angina is not a good idea.

If you get out in the sun, but not much, you can start at Vit D 2000IU D3 daily. Without a test, then it is basically a shot in the dark for larger doses.

The B12 you can try, and I would start at 5000mcg methyl form daily, on an empty stomach. But if you are not really low in either of these, taking more will not have much effect.

All the supplements besides these two cost substantial money.
Without some direction, it is difficult at this point to say what you need or would work.

I think it is possible you are gluten intolerant, but testing for that costs money.

So basically without insurance you are in a tough spot.

What you can do is clean up your diet. (lower the amount of carbs and sweets you eat). Take flax oil and fish oil, and some foods now have them added. Neither is that expensive to buy. This might improve your inflammatory pain some. Avoid alcohol.(which is expensive anyway). With less carb/sweets, your pain may improve some. You can try Salonpas patches for your knee pain, instead of ibuprofen. But if your knees are bone on bone with no cartilage, you may not see much improvement with Salonpas. (they don't work on severe cases).

Keep reading here and something may stand out for you to try.