jeroan, the advice you are getting is accurate. I am 30 years older than my wife and we got through so there is hope. I was divorced a short period prior to my new marriage. This is how we prepared
You need to know everything about hubby prior marriages, why they failed, what went wrong
Need to know everything about his life, childrens ages, grandkids etc
Where he works, what type of job, salary etc
how you will live when you move
finacial planning due to his age, will you provide for him when he retires which could be soon
If one or all of his kids approve, they need to write a letter stating that, if someone doesn't address why. In my case my daughter approved, son didn't so I addressed he was close to his mother, my daughter stated I was in a unhappy marriage in her letter and she supported my new marriage
Your family will also have really show why they would support you marrying someone so much older. The VO will assume that these letters may be to get you to CA so will need to state reasons outside of finacial. VO will wonder why they would support someone that they can't have grandkids with. My case, all of my wife's parents, brothers, aunts and uncles showed why they support.
We demonstrated 4 years of phone calls, western union, numerous flights to visit, you'll need lots of similiar evidence. If sparse you may have wait until he visits more and more proof.
IO will see his motives, gets to have a pretty young lady in his arm, someone to care for him in his old age, etc
They will certainly wonder what in it for you so you need to show all the reasons that you love him for who he is, not a visa provider.
Need to demonstrate clearly why age is not an issue for you or either family.
Provide proof of youthfull things you do together, for us it was parasailing, kayaking, dancing etc.
Why would you want to stay home and watch Gunsmoke reruns when you could be out partying with your friends, so explain why.
Just somethings to consider and the best of luck