Thanks for your question. I will try to help.
Provided that you are either able to get a mortgage (unlikely unless you have significant cash or assets anyway) then there are no real problems.
Obviously, you would have to demonstrate to your conveyancer or soliciotr that you have the mental capacity to understand the implications of the decisions that you make, but any person has to do this whatever age and it will just likely be done in simple conversation when you instruct your sollicitor.
If you were to require care and owed care home fees to the local authority then they can apply for a charge on the property eventually, but if your cash was held in a bank account then they would not pay for your care anyway (you would have to pay for it yourself).
Additionally, when you were to pass away a Grant of Probate would have to be obtained because the property would not be capable of being transferred without the Grant, but it's relatively straight forward.
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