FHA inspection workaround for no grounding in older home

[Keyur S.]

Fellow rehabbers
I just finished rehabbing my first home and put it on market. I had multiple offer and am in contract within 8 days on market

The buyer is a FHA buyer and the under 90 day flip rule applies. The lender order inspections and has found a few things. I can fix everything except the fac that the inspector has called out that there is no grounding available in th house and that this is a safety issue.

The house iwas built in 1954 when grounding didn't exist. For us to add grounding throughout the house we would need to open wall and do new wiring in the while house. I find it hard to believe that this would be a show stopper as is would eliminate all older homes from FHA loans

I could use some advise in the following
1. How to tackle this inspector / lender if u have faced a similar situation
2. Sugestions on cost effective way to get grounding done in an older house

thanks in advance

Keyur