PLease assist with Info, insight and suggestion,

I don't know how to start so I'll just jump right in. We're a South African couple in our late 50's looking to move from SA for various reasons. Basically we love travelling, living as locals, enjoying the simple things in life. Our needs are not much: safety, basic comforts ( cool in summer, warm in winter), money sufficient to travel in our old 1988 Motorhome, etc.

We're investigating Spain as our preferred option based on the understanding that the climate is not too harsh or that we can travel to the warmer parts as winter sets in. Pretty much being able to move around in our Motorhome until we find nice places to settle for longer stretches by renting. We are trying to understand the following :...

Expected cost of living based on a simple lifestyle,
Cost of camp sites and expected amenities,
Cost to rent small homes / flats etc ( preferably outside of cities) but close enough to commute ( +- 30 mins )
Safety while on the road and at home,
Friendliness of locals,
Bureaucracy while trying to settle in ( my wife is British and I am South African),

.... so many more questions, ........ this will have to do for now.

Please be so kind as to offer thoughts etc. We are looking to establish the Good, the Bad and the Ugly, of Spain so as to be in a position to make an informed decision.

kind regards for now

Ron