$100,000 of repairs is quite a lot. And like you state in point 4, it’s more renovations than repairs.
If you and W were to sink that money into the house (as renovations) you’d get it back, as in the selling price is $x+100,000 (more or less). As the house is right now, it is worth $x. Don’t let her cloud things up.
Even if these theoretical repairs are needed, W is responsible for half of them. Therefore, your buy out - the monies W would give you - would only be $50,000 less.
It looks like you are planning on moving out? And then W likely selling the house later? Or are you considering keeping it?
Anyhow, yes, moving and rent and such are each individual’s responsibility after separating. Alimony will provide a levelling out of income disparity, based upon the before joint martial income and other factors. And child support is a separate issue.
Her family’s financial help sounds interesting indeed.
D
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.