As the dust settles I think it's super important to realize that without side branch sacrifices you will only be growing telephone poles(zero taper). I know you acknowledged the importance of both side and apical sacrifice but I just want to make sure everyone is clear on it.
Telephone poles it is, growing the way as has been recommended will give you telephone poles. You need to research the care and development of a
Five Needle Pine. I can not stress how important that disclaimer is. Five Needle Pines have a totally different growth habit than Two-Needle-Pines. Most of the methods that have been forwarded to you are for Two-Needle-Pines and will not do what those methods are supposed to do with a five needle Pine, in fact those methods may kill the tree.
If you can find it; the Stone Lantern Pine Book will be a great help. It is basically a compilation of all the Pine articles ever written in Bonsai Today, a now out of publication Magizine. The publication International Bonsai has had numerous articles show casing the do's and don't's of five needle Pine cultivation.
What I remember from those articles: You can grow them in large pots as described but you much keep in mind that these trees do not back bud like two needle Pines. If you lose growth down low its gone without entering the wonderful world of grafting.
You can use escape branches to gain trunk girth but you are going to have to keep branches down low and those branches must have growth on them close into the trunk. Sometimes it is possible to design or style a tree down low but allow an upper branch to run away and pull the trunk out which is probably the best method with these guys.
Avoid side sacrifice branches because they leave you with some pretty heavy scaring, another issue with five needle Pines; they do not have the bark of a two needle Pine and scars like this will show for ever. Of course none of this is what you asked for in the beginning of this post. You asked where do you cut? Sadly until you have it in your mind what it is you plan on doing this is a difficult question to answer. I don't think I would recommend just cutting anywhere and hoping for the best just to see what happens.
Up front: the way to avoid "Telephone Pole Bonsai" is to use what is called clip and grow. You allow the apex to grow out and fatten the trunk a bit then you cut it back to a lower smaller branch. That branch is wired up to replace the terminal just removed and allowed to grow and function just like the terminal it replaced which will continue to fallen the trunk. This process is continued over and over until the base of the tree reaches the fatness you are looking for. It takes time to pull this off.
