Estimating Rehab costs dallas tx

[Juan Campos]

Hello everyone, i have a few questions regarding rehab costs for a full renovation

particularly a 3 bed 2 bath home 

house is gutted No windows 

no ac 

needs new roof 

south Dallas

I know it varies on  location property size ect.

but what is the average cost you seasoned investors pay per sqft

what is the average price for a roof ? 

ac ? 

wiring ? 

restrooms kitchen ect?

just trying to narrow down costs for when I estimate costs 

currently waiting on the book on estimating rehab costs to arrive 

thanks in advance!

also are there any whole sellers here that work in the dfw area that would like to connect? 

currently building a list of properties and I would like to tag with some of you thanks !