I was very concerned about finances when I was considering D, so I get the feeling of despair. I downloaded an free excel budgeting spreadsheet from revenue canada. It had all of the columns labeled and I just had to input various amounts. I created about half a dozen different versions based on various scenarios, from renting/owning with and without kids, working, retiring etc. I went to the CPP/OAS sites to calculate numbers as well.
Once each one was done, I was able to play with the numbers and look at what I could cut. The biggest expense after housing was my vehicle. I looked at life being car free and that helped. I looked at downsizing and what that would look like. All of this helped me wrap my head around the idea that I had options and could survive.
What I ended up doing was buying an older townhouse that requires some renos, which I can do myself. My two kids are grown and live with me. They chip in a bit and that helps. I won't be able to afford to retire before 67, but I love my job, so no worries there. I probably wo t be able to afford to live here alone, but I have the option of taking on a university student if my kids leave, and if I work a little,lose the car, and be frugal, I'm going to be okay.
My guess is that you do have options. You could move to a cheaper area of the country, downsize, get a roommate to share expenses, find a way to generate some income based on your LTD, anything. What I learned about myself was that fear of the unknown was my biggest hurdle. My lifestyle has hanged an I have come down in the world, but I am at peace. I no longer live with a cheater who caused me such significant trauma. I have friends purpose, and a reason to get up each day. No, I don't get exotic vacations anymore and have to walk by the good scotch shelves and the beef coolers, but I try to focus on what I have. I take car trips and visit my friend out of town when I need a break. Hell, I was even able to wangle up enough cash for an Alaskan cruise. Yeah, it was the cheapest cabin on the boat and I parked my car at a friend's house so I could take transit to the port,but it was still a getaway.
It's tough to say goodbye to the life you planned. Hell, by my calculations, I stand to have lost over a million dollars by the time I retire. But I am content. You can still have a rewarding life, despite the change in circumstances. Having grown up super poor,I learned how to navigate life with little money. I have my mother to thank for that.
It's funny. For all my worry, things seem to be provided for me as I need them, as long as I remain humble. I can't afford to buy my kids new things very often, but they are fine with used items. This Christmas, me kids are each getting things that have been purchased from the buy&sell. They are thankful and understanding, something I appreciate. My point is, life has a way of working out IMHO. Lillies of the field and all that.
Where you are and what you are going through is not all there is. There are good things ahead of you. Don't lose hope.
On a side note, I am now in a relationship which could possibly end up going longterm. The funny thing is that all of my speculations and calculations always assumed I would be alone for the rest of my life. Life has a funny way of surprising you when you least expect.
Hope some of this helps in a small way...