She has forgotten that I am her husband.

I would like to get the Power of attorney so that I can manage all her financial and medical affairs etc.
We are both fully resident in Spain and jointly own our house and have a joint bank account here in Spain.
Don't have any assets in the UK.
Had a look on Google but solicitors want €400- 600

Also, see reference that we can do it ourselves at a notary for about €60.
Is this correct? If so, can anybody recommend a notary in the Nerja to Rincon de la Victoria area? Preferably one who speaks English.
There is very little chance of my wife being able to understand questions in Spanish and no chance of replying in Spanish.
Thanks
Gerry