First and foremost I would pay all my moms medical bills I have no way of knowing what the end result will be but I'm sure at least 250k.
Another 150k set aside to pay for any ongoing care she may need and to get her a decent house to live in.
As for myself I'd buy 12 acres the guy I rent pasture from really wants to sell me, finish fencing it off, put up a nice barn and corral, well, septic, clearing and a cellar for around 50k ( yes where I live it can be done for that)
250k put back for retirement I would still continue to work...
The rest would be for the log cabin I want to build, a truck, trailer and 4 new horses.
2 Paints and 2 QHs
If anything left we would take a vacation and go shopping