Hello Jackie, and welcome to world of becoming strong and fit. To answer your question, I have never personally used the bowflex machine so I am no expert, I do know people who swear by the bowflex. So if that is the route you wish to travel, do your research on the web you will find the pro and the cons and then make the best choice for you.
When it comes to home gyms...machines, it is all about what will work in your lifestyle and what goals your are trying to achieve... example a hardcore body builder type would have not problem falling in love with the a product like the titan but for a novice they might be overwhelmed.
So do your research, take the time to discover what will work for your lifestyle and I wish you the very best as your strive to reach your goals and good luck to your son also. This is a great time of the year to build a better version of yourself