Tony

Trunks can be wired when they are young to the style you've chosen. Growing out junipers are a bit different from other trees you may have worked with, in that they don't backbud very well on old wood. For that reason, as the tree grows out, you have to keep lower branches alive to use in your final design. That means you'll have to prune the tops every so often to divert energies back into lower branches. Other than that just give it plenty of sunshine, water and fertilizer. When the trunk gets close to what you want dig it up and pot it up in a large training pot with good bonsai soil and start working on root and branch ramification.

Tony