How to estimate cost of repair on out of state house!

Hi. I am newbie investor. I plan investing on HUD. But I have some question that I can not figure out by my self. Since in my area, the HUD house is limited, so I want to bid on another area. But I do not know how we can estimate cost of repair on these houses. Do you have any suggestion about getting free bid from contractors on the ground, also do some inspection. Because we just have 2 days for inspection after getting accept from HUD, we have to do it quickly. Need some suggestion. Thank you.