Unless you use several pots at diff. heights. You would still end up with smaller buds on the bottom and huge colas up top. Certain hormones(auxins) control bud size and always radiate up.
Now if you were to use 3 plants on 3 diff levels, that could work awesome. Research it and find out about auxins. Then execute after your 100% sure. Wouldn't want to build something huge and have it not be perfect.
Although I will admit, some type of vertical grow has intrigued me :jointsmile:
Please tell us what you decide on.