Just to put a different perspective on the replies you have been given.
I have a semi retired friend that did exactly as you are aspiring to do 10 years ago. He didn’t work for a few years but now does the equivalent of 3 days a week. He loves the lifestyle, culture and pace of life. He had previously had health issues that have now resolved as a result of him having more leisure time to exercise and the warmer climate has definitely helped him. The healthcare he has received in Spain has also been fantastic and much quicker than the NHS.
His pool is used for 6 months of the year and he does all the maintenance himself so it’s much cheaper than paying someone to do it. He buys all his fruit and veg from the markets, as we do when we are visiting our holiday home, and knows the best places for the bargains. He does think prices, particularly for food, have risen but then again, they have in the UK.
He and his wife are heavily involved in the community and have a big social network of friends. They love their lifestyle and ended up selling their UK home, such was their love of their new life.
There are definitely complexities to living in Spain but where there is a will, there is usually a way. Just wanted to offer a positive perspective from close friends who have lived the lifestyle change that you are considering.