My father is almost totally blind (Nobody really knows how much he can see because he has been lying about it for years) and is showing early signs of dementia.
He lives at home (is single) and refuses to let anyone come in to help him out and won't even discuss other living arrangements. He refused to do anything with a power of attorney or will. My sister and I have no idea what kind of insurance he has. I'm in a different state trying to help my sister out (she lives near him) He is WAY past the point of being home alone, but I just don't know where to go with this...
You should also be aware that being appointed as guardian is Fiduciary responsiblity and you are legally responsible to have proof of every single penny into and out of your father's assets. If your father fights your actions this is a miserable thing to undertake.
You can also search online for guardianship proceeding information for your father's court jurisdictional area.
I did a quick search on "Katy, Texas, guardianship proceedures". Try that, read over the articles, then contact the court for issues that might need clarification.
It may be suggested that you hire an attorney to handle the guardianship. If so, search on "guardianships" for law firms that handle them. You could also search on "elder law", but guardianships aren't limited to aging issues.
You could also contact the local county offices, or state offices, to ask if they have any brochures or guidance on getting guardianships. In fact, thinking over the issue, I think the county might have some resources to help both you and your sister as well as your father. If he won't allow people in his residence, and is nearly blind, I'm guessing that there are some broader health issues, and/or he may need to stay elsewhere until his residence is livable.
If you have trouble getting this far, and don't understand something, just post back.