Settling debts for an estate

[Greg_Georgia]

I am the executor for my mother-in-laws estate (in Probate in Georgia). She had one vehicle in her name (financed) and half ownership (with her spouse) of a mobile home that was mortgages. Her husband filed for and was granted a Years Support for the mobile home and the vehicle - to which her 3 adult children had no opposition - since there wasn't any equity is either.

The estate has several debts such as loans from the 3 children for burial costs, 5 or so medical bills not paid by insurance, and attorney fees for assisting with probate, etc (almost $15K total). My question is if there is any money that comes into the estate - such as a small asbestos settlement from her former employer or a lump sump settlement from a injury case that is currently in appeals court - what method is used to determine who gets paid first? Or is a percentage paid out across all debts whenever money is received into the estate? The estate currently has no money whatsoever and her spouse is moving on with his life and doesn't communicate with me.

There is a will that leaves everything to her husband and the 3 adult children.