See an attorney in person. No way to estimate cost without having all the facts and documents at the attorney's disposal.

You have a lawyer? If you do not, you should get one. If you have one, ask your lawyer..........................................

You need the children to agree to the change. .....................................................................

The simplest way if both spouses are still alive is to do a new deed from both spouses to both spouses as joint tenants with rights of survivorship.

No you do not have to do anything, whether you live with her or not. ......................................................................

You may have to probate a couple of estates. See an attorney.........................................................................................

Find the will. Find the attorney who drafted it? Consult with an attorney locally. No magic to finding a will.

Ask them for a copy of the contract in writing. I would do nothing until the company does........................................

Sounds like a waste of time. Somone else paid to bury your husband? ...................................................

If taxes are not paid then the property will be foreclosed on. You might be able to buy it at a tax sale. Roommate has no relatives? Hard to...