Need help with Vestibule to replace Bilco doors

Leola PA

Description

Looking for someone to help out with building a Vestibule to replace some bilco doors going down to my basement. Need someone with knowledge of attaching a structure like this to a house. Will need to cut the siding and flash it out. I'm not 100% on how to do this. I have all the tools. (except a brake if needed) I just need someone with the knowledge and a little bit of time to help me get it built. Not necessarily going to lay the roof out the way I have the blue tape in the picture. I may go higher up on the wall and slope it down away from the house. One other thing, the wall has a recessed area cut out on the inside, so it is missing some studs. Should be able to find something to attach to and make it structural though. Need to get this done asap. Text or call me if you have any questions or to come take a look at it.