Mortgages Way Forward

awase

Hi new to the forum,
My dad is currently living in a care home and we are rapidly approaching the point where we will need to sell his house to buy an annuity to fund his care.
The annuity is about 120k and the house is worth about 400k, with myself and another relative due to inherit equals shares. Current plan is to sell the house buy the annuity. For me to get a mortgage and take some of the inheritance to boost my deposit.
This is a workable plan but I am wondering if there are alternative ways to fund this which help retain more of the value of the house. As I am getting on in years it is pretty clear that I need to get a mortgage and of course my dads care is the most important factor in this.
I have thought perhaps it is possible for me to get a mortgage against the house for the amount of the annuity, which would leave the house intact to be sold at a later date, but also giving me a mortgage to transfer to another house at a later date.
I know alternative solutions will obviously require professional financial advice but just wondered if anyone here had any good ideas that I could follow up.

Regards

Awase