My grandmother's estate is fairly sizeable. Roughly $250K in savings/investments (could be more than that by now, for all I know...I haven't checked lately as my Mom handles that). Her house is paid off. Needs a lot of work to get it fixed up really nice, but I imagine it would fetch around $200K, as is.
Right now, her estate is set up to go 40% to my Mom, 40% to my uncle, and 20% to me. I'm the only grandkid.
I don't even consider the house as part of it though, because my uncle will probably live in it. I doubt it would get sold anytime soon.
As for the $250K in savings and such, well if I got $50K, it's a pretty sizeable sum, nothing to thumb my nose at. But that $50K wouldn't be a life changing event. At a 3% SWR, that's an extra $1500 per year of cushioning. If I put it towards my 3.5% mortgage, it would save me about $1750 in interest that first year. Now, I have been saving/investing around $25000 per year lately, so I guess one way of looking at it is that it would put me ahead roughly two years.
My Mom's retired, and stepdad is about to retire. Combined, they'll get a decent pension, even though my stepdad's worried about not having enough money. The $100K they're getting won't be life changing to them, either.
As for my uncle, well, he'll probably use it to help stay in Grandmom's house, and draw it down when needed. So, it would help him to stay afloat. That would be a big deal for him. But, even if it got to be too much for him, my Mom and I would help him out. And even if Grandmom's house had to be sold one day, we'd still make sure he had a place to live.
And honestly, I'm not counting on getting anything. Grandmom's 87 now, and still fairly healthy, but she could always have some condition that runs up a huge medical bill that drains everything away. I'd rather consider it an unexpected windfall if it does happen, than plan for it and have it not happen.
My Granddad on my Dad's side of the family is still alive at 96. I have no idea how much he has saved and invested over the years. He gets a pension from working on the railroad, and they always lived below their means. That side of the family really doesn't talk about money though. On that side of the family there are three sons, and six grandsons. I've heard that us grandkids are included in the will, so it's not just going to my Dad and two uncles. But, again, I have no idea how much it is, so I don't plan for it.