I agree with 14+, 10 years old is barely middle-aged. Way too young for a cat to die. One concern I have is how unbalanced your meat "scraps" are. I guess since you're talking about outdoor cats, they're likely (hopefully) eating plenty of mice to get the proper ratio of nutrients (calcium to phosphorus in particular). Otherwise you really need to pay more attention to the meat/bone/organ proportions. Unlike dogs, who are much more flexible when it comes to nutrition, cats have very specific requirements with little room for error.
As for not neutering, well I hope you spend some time on this message board and change your tune in time to help your new cat, Jack. Maybe he'll even manage to survive into his golden years.
"To close your eyes will not ease another's pain." ~ Chinese Proverb
“We must not refuse to see with our eyes what they must endure with their bodies.” ~ Gretchen Wyler