should I add central air to my flip?

[Dan Pereda]

Hey all,   I am doing a flip in Hamilton NJ

Bought for 72K + repairs and other costs will come total investment of 102K the ARV 140k.

I get debating if i should add central air.  it would be about 8.5K taking my investment to 110k.

I am worried that with out central air it will take a long time to sell, but not sure i am going to the 9k back at selling time.

Any advice?