Firstly there is only one mammy for all of us and the loss of your own is deeply personal, please accept my sympathies.
It is reasonable to expect differing views with 8 in the family, you have not mentioned Dad so I assume he has also passed. The Executor wields the power, suggest a family meeting and ask if anybody is interested in buying the old family home, If so suggest the Executor gets it valued and let those interested know the valuation, interested parties can then tender privately bya certain time in a sealed envelope direct to the Solicitor handling probate, that is the fairest way.
If nobody is interested then suggest that the house be put on the market and disposed of, as mentioned above any other way will in time be beyond messy even with the best will in the world, parden the pun.