Malc
Im in a similar position to yourself now that i have built up a round and im working 6 days a week now and have been fortunate in recent months as ive been able to work through the weather. I already employ 1 man but im weighing up the options
I could employ one more man to reduce the days meaning i have more free days to find work for and continue to expand.
Another option is to sell off the excess work i dont want and continue to expand until i get to the stage that i need to sell again
The decision is hard but which ever option i choose it will work for me. The option you have to make is more on the basis of whether you want to earn more through employing or earn less through selling and reducing your work load.
I would employ part time until you find the right person then look at getting more work
Good Luck
Danny