Attic loft

I have a old Victorian house and thinking of doing the below Can any one see any major issues and if I have to remove half the roof what will they do

https://www.youtube.com/watch?v=Ws6MKmN9y2k

Also if I want to create a box dormer style as below everyone is telling me I wont get change out of 100K

https://jacksonlofts.files.wordpress...le_1060648.jpg go regarding my estimates where am I going wrong

2K scaffolding

3 K treated pine timber for frame

5 K colorbond sheets

4 K for joists and flooring

3 K electrical

19 K Labor


Its only going to be a bedroom

Where am I going wrong


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