Buying an aircraft ? LLC, partnership .. WA state!

Looking to buy an aircraft, but do not know where to start. Read a lot on AOPA, and other details but here is the situation.

I have found a partner to buy it with, and we both are in WA state. We would like to start an LLC - reading a lot about Delaware LLC... Pros and cons ? Apart from privacy and no sales tax, it doesn't make a much difference. Am I missing anything

Also, we want to do some financing, so how does the financing work with LLCs, any recommendations?

Finally I also read about having aircraft on LLC, but also doing like a leaseback when each of us fly it. Any thoughts on these.

Would appreciate if anyone has gone through this!