Den, the fixed costs should be readily estimated......cost of capital to finance aircraft......cost of time -constrained maint/overhaul/replacement
depreciation.
Fluid costs are storage and admin (plus lawyers?)
Assets are the reusable components/contents of the hull, less cost of dismantling and removal.
Bean-counters will want a big gap between the projected cost of re-commissioning and net revenue from breaking.
the repaired hull may well have a reduced resale value but that's not relevant as the owner would tend to use it's full life in revenue service (this (ethiopian) would produce the same return as a non-repaired hull)
The longer it sits, the more the gap in viability of repair shrinks. Remember, the "industry" surrounding the loss/ repair all want paying, as does the airport.
Rome /Nero / Fiddle /Burn (highly appropriate under the circumstances
)