Opinions on floor plan for new build please! Help me make my mind up

[houserenohelp]

Hi everyone we are planning a new build with small annexe and I need some help with the floor plans. Its a kit house being built by a local builder and they have done the plans for me.

Budget is £250k this build cost is £280-300k so want to make some savings.
Builders plans and then my amendments attached.

Thinking to save cost to remove the utility room and although it was my idea now having doubts about having the kitchen upstairs in the sloped area as don't want it to feel cramped.

Putting bathrooms above and next to each other is cheaper as well- or over kitchen if that isnt possible. keep all the internal and external drainage to one side

Ok thanks everyone

We are in Scotland so rectangular / T shaped houses preferred and same as 1.5storey.
Sound proofing etc will be included between the annexe and house and floors

Front will have big windows looking to the views every room has a window

Stairs have to be that shape for head shape. There is a dormer above.

Every room has a window, upstairs sky lights.