Biggest issue will be staffing. You will go through about 5 boys to get one good un. Then the good un will see the light and set up on his own. This is just the tip of the iceberg.
So after 14 years of building up work You have gained enough for yourself. So how long do you think it's going to take to build the work for 3 vans ?. If your to busy and want to grow then take 1 person on to work with you until that workload gets to much and repeat the process.
Why don't you have a quick google before making stupid comments?