The purchase price is now irrelevant because the basis would be the FMV on the date of your father's passing.
The alternate valuation date would not apply unless that value would both reduce the gross estate AND reduce the amount of estate tax due (and apparently the estate is not large enough to be required to pay any estate tax). Further, the alternate valuation date is always in the future (6 months after the date of death), not prior thereto.
Whether you can get the expenses you paid from the trust corpus should be delineated in the trust itself. The outlay is almost certainly not deductible in any case.
