Information from different organization about the hourly cost is between $15 and $25, depending on where you live. Comparison of different assertions would help evaluate the reasonable cost for long-term care:   

Federal Long Term Care Insurance (FLTCI) Care Costs Statement

Genworth 2012 Cost of Care Survey

Complete Long-Term Care Costs Survey

National Private Duty Association (NPDA) Survey Home Care Costs

National Clearing House Long Term-Care Information