I have a disabled daughter who will end up in a wheelchair eventually. I was wanting to know if there are construction loans/grants out there that I could get for a handicap accessible home.

Construction loans yes, grants are a big maybe. What is her disability? Sometimes fund raising groups support a specific cause/illness and may loan or give money to people afflicted with that illness.

Many insurance companies have provisions for this. If you don't have the insurance that provides this service, then you can apply to Social Security for SSI disability and they could provide some support. I have found that your friends, family, church and community are great options for help.

There are many programs dependig on the disability,
And often local charity groups, your local religious group, the American legion all help to do things for local people in need.