Estimating Rehab costs?

[Allen McGlashing]

Hey everyone, 

I would like to know me being an inexperienced rehabber; how can I estimate rehab costs? This is my next step in my Brrrrr strategy. Any books you recommend (like estimating rehab cost by J.Scott) or software that would help so I can feel safer making qualifying offers? Maybe a generalization on how much a kitchen costs or bathroom obviously it depends on the quality of material, but I’m just looking for a generalized estimate to get me to make an offer