Okay, I should share some recent experience so others can learn and avoid.
Backgound: ex WW and I had in house separation while we both looked for new homes. Plan was for her to buy and I would refinance marital home to cash her equity out. Several of her offers feel through and I found a home and close next Friday.
Our D was finalized in December. My youngest DS has 3 more years of HS and I agreed to make provisions to provide one half of the mortgage payment on the marital home in addition to CS and paying for all of my kids expenses. I will not receive my equity in the home until it is sold in 3 years. I was glad to do this for DS.
So for the lesson learned. The addition of the one half of the mortgage payment and CS with my mortgage on the new home put me over the threshold for mortgage guidelines. Fortunately, my lender is working with me to provide the mortgage for the new home and I have my fingers crossed.
So, I was financially able to do this (though a stretch), allow DS to complete HS in the wonderful home he grew up in, and give my ex WW the opportunity to search for a home that is good for her as opposed to buying whatever is available. It was a good thing to do but now may have negative and negative consequences.