I am undertaking a few well overdue DIY jobs all at the same time.
Laying flooring throughout , tiling the kitchen and downstairs bathroom and fitting new kitchen work tops and sink.

My main question about is fitting the sink and taps. We currently have two taps on our existing sink but would like to swap to a single mixer tap.
Would I need a plumber to change the way The water is fed to the taps. Obviously I have a hot water feed and cold water feed. Is it a simple job to convert to a mixer ?

Other question is fitting new door frames and specifically the join to the skirting board. The skirting and frame will be shaped ( moulded I think the term is) so was thinking it would be difficult to join them.
My mate suggests a separate door face block at the bottom of the frame the same height as the skirting.
is this easy to mess up


I made an absolute erse of tiling my kitchen floor a few years ago so I want to prove I am manly enough to do a decent job this time.

Compound mitre saw for the skirtings and frames ?