Yeah , consistency can be hard with a normal life outside the gym . I do think something like 5/3/1 will be a challenge of you can't be consistent though .
Have you looked at the Mike Matthews bigger leaner stronger programs? They have 3 day splits . I really enjoyed doing those workouts, and saw good progress. He has some good advice on balancing diet and strength gains too. All common sense stuff really, but well articulated.
There are a ton of conditioning based programs too which I think fits the brief of fit and healthy