Do I understand my situation correctly? Do I have a reasonable chance of success? How will international/Australian laws effect?

You have a somewhat complex issue here. It's great that you've done some research and come up with some of the laws that apply. I haven't looked...

Is that a breach of contract

The answer -- as to many legal questions -- is maybe. It will depend first on what the contract says, assuming there is one and it addresses this...

What do we do next?

All of my colleagues have given you good answers. However, before you file a small claims suit, decide whether it will be worth the trouble of...

Can he terminate this agreement or is it a legal document in the state of Washington

Tell him to get a copy of the document and take it to a real estate lawyer to review. Then he can be advised on his rights.

What can I do to represent myself in court? I was never able to put plates on the car and thus, I was never able to drive it.

More information would be needed and is better communicated in a one on one consultation than over a public forum. For example, it is impossible...

What am I responsible for and what recourse do I have?

You need to look at the lease. Even though it was expired, it may be that it addressed what happens after expiration on a month to month basis. ...

I agree with Mr. Kaufman. By the number of similar questions on here, many car dealers are doing this or something similar. You need to see what...

Explain the difference

No one on this public Q&A forum can give you actual legal advice. It is not a good idea to air specific factsw of a business arrangement in...

Is it worth an attorney's time to pursue this? If not, is there anything I can do that is likely to have a positive result?

I agree with the other answers. In addition, you can contact the trustee to put the trustee on notice that you are a creditor. There are other...

I wish to find a qualified attorney to examine the draft and advise me to make sure the terms are fair and standard.

A contract or intellectual property attorney can review the contract for you. You should find someone who does patent work and is familiar with...