The original price was $180K, but we were able to negotiate down to $165K due to the roof age and some water issues in the basement (offered $170K due to roof, and went down additional $5K in inspection).

They will also tell you it must be inspected and depending on the inspection they can make you rip it all out or just update certain things. 

Have a plumber inspect the property!

u will lose time  your inspection cost and other dollars just to save 6k which wont mean anything over a 20 year hold right ?

I don’t look at anything close to 100 houses In person or even online that is not what I do in fact I no longer even go inside the house I put an offer in and no longer have any inspection nor contingencies.  

During the inspection walkthrough we did find the sewer drain to be backed up and put that on the remedy list for the seller to have a licensed plumber snake the line.

I had the property for 3 months, inspected and watched over heavy sustained rains, but only a few days ago I had water pooling near the spot in the basement. 

A GC will typically have a google folder with photos to update you on progress but nothing beats physical quality control inspections.

Is the seller going to be at inspection?

I did real estate inspections for about 4 years.