They should be able to tell you if she has enough items to have a auction on premises, or whether her items may need to be combined with other estates at an auction house.
There will be some ad costs and commissions to deal with...but the great thing about auctions is that everything is gone at the end of the sale.
I will answer any specific questions that you have about auctions...fire away, if you'd like.
I’m almost positive that she has enough stuff to auction. So, should we auction the house, too.