as in any business, you will have to put the hard work in befoere you reap any rewards , wether small or large, and this will depend entiirley on you....
do you want a small round, with a wish to retire it later in life, to a part time round,?... or do you prefer to pursue a more vigourous approach and build build build?...
its up to you, but what i will advice ,is you will have to work hard which ever direction you take.
and, oh , you are not too old at all.....you are in your prime of your working life,
that has already shone through with your desire to change direction. that is ambition!!....
and if you still have that you can do anything you desire.
Gary.