Advice please, has anyone sold up and bought a property with a parent?

[Sunnymeg]

Mum is struggling with independent living. We are looking at her options, she refuses to consider going in a home and to be fair she would be OK with her family around her. We are considering selling her bungalow and our house and buying a property with an annexe. A local builder is currently building a small number of such properties. Mum would need to contribute two thirds of the price and we would one third from the sale of our house, but we would then be mortgage free The deeds would reflect the fact Mum owned a larger proportion, and we would have a lifetime interest in the property. I am envisiging that whatever Mum makes on her property would then wholly go into the new house, give or take a few thousand for decoration, fitting any aids she needs etc.
Her existing capital would be untouched.

Does anyone have any views on this, I:m wondering if there is any obvious problems I can't see. Any care Mum would need if things get worse would be self funding for a number of years on her existing assets.

Forgot to say, I am the only beneficiary of her will.

Get legal advice from AGE UK before you do anything.
If your mum needs care in the future you could be forced to sell the property in order to pay the value of her part of it to social services, leaving you homeless and looking for a much cheaper, smaller property.

At upwards of £800 per week for a care home savings don't last long.

Thanks, I had been told that if we have a lifetime interest in the property they cannot force us to sell.

I believe, though am not wholly certain, that new legislation is being introduced which would mean that there is a cap on the amount that would be spent on care. I think the figure was £70,000 or so as the absolute maximum.