3-unit mfh severely underappraised

[Cole Puterbaugh]

Under contract for a 3-unit mfr in Cleveland. My first purchase. 

Purchase price is 177K.

Appraisal is 138K.

I cannot make up the difference with cash since I'm already at the top end of my purchasing ability.

Is ordering another appraisal worth it? Comps in the area seem to support the appraised value...