Sister 2 says that her son and partner will be moving into house in few weeks and only texted me to see was that ok..
NO NO NO. Don't let this happen.
What your sister is angling for is possession and ultimately ownership. That's my read of the situation. When it comes to wills it seems to bring out the worse in people.
I think the majority of posters have told you the correct way to go is to sell the property. If one sibling will buy the rest out than fair enough. If they want to but cannot afford to do so, then my advice is still to sell.
Eight people are impossible to deal with.
Please tackle your executor sister, to support her in the decision to sell and be open and honest to all your siblings on what you want to see happen. I'm sure they all too want their share, and nothing wrong with that. It's just people are naturally a bit emotional at the moment and don't want to be seen to be mercenary.