Well I've found the cat! Did a bit of digging to put in a fence post as well as get a bit of clay for the clay slip. Local timber yard gave me their sawdust and shavings to mix in to make the insulation base. I need to soak the clay over night to make it into a cream like consistency before adding the sawdust and shavings!
So far it's taken 2-3 of us about a day of real time to get thus far, it's the foundation drying time that took the time.
I've started a sour dough starter inside the house... It went a bit greenish but seems to actually be doing something now. I started it on Thursday with 1/4 cup water and 1/4 plain flour. This morning I threw 1/4 cup away and added 1/4 water and 1/4 flour again, will repeat again tonight. It smells a little odd - not like normal yeast. I'll see how it does and bake a set in the bread machine next week and see what happens!
Mean time I'm working through the beers (even as I type)
I'm not too worried about the design or the setup. I intend to grout it with a clay mud then later do a lime render on it to pretty it up.
The reason I'm getting on with it is because in about a month I'm having a house warming party and promised fresh pizza in the garden

I'm also cutting my teeth on my first bit of brickwork before I start building a brick BBQ.
There is a small part of me that is worried that it'll turn out rushed and crap but there's another part that's inebriated by the beer I'm drinking which is over riding the worries.
I'm hoping the weather holds out till next weekend as that's when I'm planning to do the dome. Tomorrow hoping to get the base insulation done.