What are advantages & disadvantages of having a trust vs a will? How are costs of each comparable?

For the amount of assets involved, I would strongly reccomend a trust, as it will allow for districution of the assets without probate. Although a...

Can I file for guardianship over my nephew?

And to answer your question, not only CAN you file for guradianship over him, but you definitely NEED to do so.

What is financial power of attorney? Does it mean I am responsible for his debt?

A POA is not resonsible for the debt of the person who gave them the POA. You need to first get POA for your dad so you can handle his affairs. ...

How would I contest a will?

Normally, the basis for contesting a will is because a person exercised undue influence over the person making the will, which is not the case...

How hard is it to adopt when we have already established perm guardianship?

You will need to consult a family law/adoption attorney to fully answer this, especially if the mother is not going to consent to the adoption. ...

Will my mom be able to step up the basis on her house 100%?

Your mother should consult with an attorney on that, because depending on how the house was titled, she may only get a partial step up in basis.

She should consult with an estate planning attorney and place her guardianship choices in writing as soon as possible.

As executor of the estate you will definitely want to talk to your attorney about getting a copy of the POA, because your sister may have been...

Do I have to become administrator for my deceased brother?

Unless you are seeking to have some asset of his passed to you, there is no obligation on you to open a probate estate. If, in fact, that is the...

His brother will have to go to court and establish the need for guardianship, and that he should be the guardian. Once his brother does start...