I will help my DD as much as I can. But does that mean I have to sell my home?
Because of where we live, if house prices keep doing what they are, our home will be worth a stupid amount by the time she's ready to move out. But it's a small 2 bed. It's very difficult to downsize from that and live comfortably. It would mean moving to a worse area and changing our lifestyle, which is already quite simple because that's who we are.
In OPs case, she has a sister. So if her parents gifted her one of their rental properties, they'd likely have to do the same for the sister, in the interest of fairness. But they're still paying a mortgage on them, so how would that be fair to the parents? As it is, the are letting OP live there at a reduced rent, which is still support.
Depending on where in the country, 1.4million in property could be a modest home and one rental. It could be a massive home and three rentals. But at the end of the day, OPs parents would have to take a hit on their retirement to give her something, because they'd lose the income on the rental, or they'd have to downsize and lose equity. In the long term, it's better if they have a good income and assets to help pay for care if they need it. If they don't need it, OP is in for a lovely windfall later on anyway. If they don't have it, who do you think is paying for their care? With OPs attitude it won't be her, it'll be the tax payer.