I'm not sorry for being so firm in my response, but I am sorry Its necessary to respond to Stephan that way..
I was new at this a long time ago. I got the same contradictory advice, and because theres nothing I can do about the sun, I chose repotting and fertilizing and fungus treatments and different sized pots or different materials and flushed hundreds of dollars and hours of effort down the drain, because the knowledgeable people who knew better weren't forceful. They gave me their option and someone else gave me a different option that was more do-able, or less money, and I had to learn by experience, all of those easy outs were just a waste of money and effort.