Fortunately there are a number of organizations -- in addition to state and federal governments with programs designed to help folks like you. I would recommend that you start with the overview of Grants for Home Repair for some great tips and leads regarding these programs.
Also be sure to contact your nearest office of the USDA's Rural Development Program in Stillwater. You can reach them by phone at 1-800=530-448-8044. You could be perfect candidates for their loans and grants since you live in a rural area, own a single family home, are elderly and low income.