Can one of us dispute and try to invalidate the agreement ?

Too late.

Help me by letting me know the proper forms and rules governing trial by declaration (trial by affidavit)

You either hire a local attorney or you show up yourself.

How do I answer Part 9 on N400 or what questions should I answer

No one is going to tell you how to answer the questions.

Can an officer obtain an arrest warrant based on anonymous tips and an ip address that lead him to investigate the crime? Absolutely! Good luck.

I have a crazy neighbor where I mow what can I do about their antics and can I wear my gun non concealed on my person?

How about this - ignore them.

The owner of the wall, that's who. First you have to determine WHO owns the wall. Pay for a survey.

What are the risk I am having in this relationship.?

The same issues that confront every other couple contemplating marriage.

Is this slander? What they put me and my family through I can't explain in words. Almost 6 months later and we still are a mess.

Probably not. But I might rethink it. I would also edit it a bit.

With the above scenario, am I entitled to anything from my husband's estate

Why did you say 'biological' child? Are there other children in the mix? You probably have a life estate in the home, unless there are other...

Can a landlord evict cause we make the property look better?

Read your lease. If you have violated the terms of the lead, then yes.