How do newbie wholesalers accurately assess rehab costs?

[Kim Handelman]

Hey guys,

I have a lead on a property to wholesale (I'm brand new to wholesaling) I think I can get it at 70% of ARV but am worried that the work needed -- I don't know if it's ever been remodeled and has some water stains in the ceiling -- will be too much for a flipper to take on for the profit margin. How do wholesalers accurately assess rehab costs?