Hello! Large two story extension on a shoestring

[Shoestring]

Hello all! I have been reading the wealth of information (thank you ?) from this site for months & finally joined yesterday, don't know what took me so long! My husband, 6yr old daughter and I began a project on our tired 1950's bungalow (which we have lived in for 9 years) in May, which has involved pulling half of it down, and putting up a two storey extension in its place.  We have gone for blockwork construction (dense externally, lightweight internally with 50mm PIR part fill in the cavity) and will be cladding in larch. We have lovely views all around us and so glazing has been key for us, but without wanting to go ultra-modern with the design.  Our budget is very tight so we are putting our money into the structure with any fancy finishing touches just having to wait.  Any advice is greatly welcomed.