yeah that will work, as long as you follow all the hydro rules obviously. Personally, i keep mothers in soil because it is much much easier. Even a soil plant under cfl or fluorescents will produce plenty of cloneable branches, and it requires hardly any attention between harvesting it's branches. Also, my mothers are precious and it would fuck my op if they died, and things die in hydro a lot more then in soil. It's up to you of course, but i'd rather soil mothers and if i had money to spare id invest in some hid lighting to grow them under. That will produce many more clones then the "accelerated" growth of hydro.