From your initial posting, it seems like there is some information missing.
As stated by kjm_rebuild, before anything is done, do you have a work authorization or actual contract. Even if you don't do the repairs, I would charge a minimum of $500 to do a preliminary estimate. This would satisfy the adjuster so the insured could be paid the policy limits. Percentages for debris removal and waiving the deductible also come into play.
Either the insured should have some photos, or a realtor or online photos of the roof and structure are available.
Heck, I can create an estimate to max out policy limits without even being there. It doesn't need to be exact. I would call it a preliminary estimate of repair.
I don't understand your 8/4 posting, where you say "the adjuster is dragging his feet on everything..."
Is the insured on your side?
Who is the insurance company?
Is this an ACV (actual cash value) or RCV (replacement cost value) policy?
Has the insured got any money yet?
Payouts will be Cov A-structure, Cov B-other structures, Cov C-Contents and Cov D-ALE (additional living expenses).
If the adjuster got a sub, they may want to see if they can rebuild the house for "like or similar kind" for less than policy limits. Yet, if it was leveled, they should give them their money and they could live in a tent.....doesn't matter. Their sub could come in with a low ball number on purpose, and, one day after the contract, come back with a supplement for $100,000.
Replacment costs will include all demo, too. Using Xactimate, your key categories could be General Items (dumpsters, engineer fees, permits, etc), Foundation, Roof, Elevations, Interior, Lanai, Pool.
Where are they living?
Have they received ALE (additional living expenses) from the carrier?
How much of the structure is still on site; any demo yet?
Although too much time has passed by now, who addressed the saving or salvaging of their contents, if any?
Are you only going to be involved for the structure?
More information is needed to explain the delays.
If you want, I can send you a template of a 3-BR, 2-Bth to show you the detail involved..