Most of it is simple diy if you've got somewhere relatively dry and warm to do it.
Stat/ waterpump, disa, are a piece of cake as is the rad and expansion tank ( which I wouldn't do unless you need to, when they go they go).
Ccv and vanos seals ( and valve cover gasket) aren't technically difficult but are time consuming, trailing arms are simple so long as you have a decent press of some sort ( I used an eBay tool and electric impact gun) but involves lying on the ground in winter, as do the front arms.
Given you need it aligned after these I'd be tempted to get someone to do them if its going to be done in winter