cant get past my fear of rehab estimates.....

[Mubasher Riaz]

i found plenty of vacant houses, tracked down the owners and on the phone talking to them, right when they say "well what is your offer" to me, I freeze! These houses need rehab work, I know the comps but I cant add in the rehab estimate to complete the offer cause I don't know what the estimate is. If I can get pass this obstacle, I'm positive to have some deals under contract in no time. How do other wholesalers come about this issue?