It is vital to have home inspections conducted by a professional that is concerned for your well being, not just there to get the deal done. I would suggest conducting a full home inspection, utilizing a structural engineer, a licensed EMP inspector, and a termite company which will look at wood rot and pest control. Alarm and fireplace are optional as well, these are free of charge. Your initial investment will range from $500-$600 depending on your area.
In the Tulsa and Surrounding areas I would suggest utilizing ACL Home Inspections. This company is thorough and dedicated to you. Ash is the owner and the contact. (918)521-3818.