I agree to any and all plans that seem best to you.

The threshold issue: whether Mr. Wheldon has installed a toilet, a sink
for washing (ourselves and dishes) and (possibly) a shower. If not, should
you ask him to do this? Should we do it ourselves? Has he tested the well,
the pressure tank? Has he drained the water ... ((I myself would not discuss
these issues, but pay him, cordially shake hands with him, and do what I
pleased without asking permission. But we shall do what is congenial to YOU.
I will go along with all your decisions, - and with you, - if you will take me.))

The convention as you know is for workmen to use outside toilets 
(porta-potties), to bring their lunches, and to spend the night elsewhere.
Toilets, sinks and showers are not customarily installed until the walls
and floors have been finished. Arguably the buiding commissioner might
prohibit sleeping, cooking, washing, urinating, defecating, breathing
until he had issued an occupancy permit. I would do nothing further in
the way of construction (except perhaps Cat-5 and Coaxial cable until the
framing has been approved. Also ascertain whether the insulation requires
to be inspected. Otherwise, if the framing - or insulation inspector found toilet,
sink and shower installed, the project might recycle to 2008, - if you know what I mean.

I would consider asking Mr. Wheldon to recommend an insulation contractor.
There is listed for Nantucket an air-conditioning contractor named Wheldon
who installs insulation; might also make a few telephone calls and/or a
few e-mails to test the insulation market. Just possibly it might be more economical
(and administratively simpler) if we deferred moving in until any required
insulation inspection had been performed.