Do you always use a home inspector?

[Kyle Z.]

This question/s relates to due diligence and inspection of potential properties.  for the purpose of of explaining my exact circumstance I am looking at a 30k Single family home and plan on using it as a long term rental. 

Do you always use certified inspectors before buying a property?

If not, how do you determine the condition of certain items like 

• HVAC units
• Electrical wiring
• foundation issues 
• Roof issues
• Drainage issues

Is there a good book anyone can suggest that explain what to look for when inspecting properties?

Thanks!