Negotiating Repair Credit

[Clarence Oliver]

2unit -chicago, il

Purchase Price - 109k

No formal appraisal.  Zillow says 165k

Unit 1 - 1075/mo, 2bd, 1 ba

Unit 2 - 800/mo, 2bd, 1 ba

203k streamline 

Formal Inspection - no major issues

Followup with 203k Contractor - structural issues ~ 10 -15k in repairs.  Very reputable contractor!

Is it worth asking for repair credits?  My realtor almost flipped out when I requested 10k in credits accompanied by the formal estimate.  House not appraised.  Just trying to figure out best recourse and options.  From my understanding structural = not safe.  Should sellet not bear any responsibility in the cost for those repairs.  All other upgrades are on me.