A professional home inspection is a non-destructive inspection of the systems and componants of a house. This should give a good overview as to the condition of the home.
Yes, it is always better to attend. This gives you a chance to better understand whatb is involved, and ask questions about the condition of the house.
You ring me and I will come and asess the situation. Home Inspection is not an exact science and is a snap shot of the property on the day of the Inspection.