Painting,tile,make ready etc.

Everyone I talk to has gone over budget which makes me want to downscale my plans. However that seems to defeat the object…

I want to build a timber framed house approx 1700sq ft 4 bed 2 bath with brick and tile finish.

I already have the land…My partner and I can do a lot of the painting / tiling and labour work so we can save a bit of cash.

Is £100,000 maximum realistic for the North of England including all major works, kitchen and bathroom fittings?

Or do I shelve the project?

What is the average profit margin of a painting contracting company in the US?
Do you have any idea on the question sir?