The deed of trust means exactly what you described. After the mortgage has been paid off, and solicitors fees paid, each will get the amount stated in the deed of trust, any remaining funds will be divided 50/50.
As an unemployed person your daughter has no chance of getting a mortgage. She may not be eligible for certain benefits if she has substantial savings in the bank ie the money from the sale of the house.
No one can say what to do, but I would suggest once the baby is born she should get a job ( why wait 2 years?) and after 6 months apply for a mortgage on the smallest/cheapest property available. Depending where she lives, a deposit of around £37K will go a long way to persuading a mortgage company to loan.