What should know before i ask for permission to get a property under contract and pay for an inspector? 

You and your partner are available to answer questions from subs and inspectors during working hours.5.

A buyer will likely hire someone to inspect the property and will then re-negotiate or not based on what the inspector finds.

Can anyone recommend an investor-friendly inspector familiar who works in the 48070 area? 

Master bedroom had a low points ranging from -0.7" to -3.5""The house has experienced settling of the foundation""It is my opinion that the foundation remains structurally sound and re-leveling is not required at this time.During our inspection of the home we came across the following:Noticeable sloping when walking around.Buckling hardwood floors in the master bedroomCracked and delaminated tile in the master bathroomCracked bricks and mortar joints on the exteriorHome inspector said there is definitely evidence of foundation movementPermapier came out to provide a free estimate and evaluation and suggested multiple piers along master bedroom as well as some other areas of the home. 

Always obtain your own reliable number - from an investor-friendly inspector or appraiser or from an experienced investor.

I had a great interview with a mortgage broker and I’ve got a CPA, home inspector, and possibly an eviction attorney lined up to appear soon.

Inspector, appraisal, closing, getting insurance.

It looks like the letter is a month old.An ordinary case of termites won't typically bring out a building inspector. 

I plan to hire an inspector to confirm this.