Peeps, patanong lang...

Our house has a concrete wall about 8 feet tall, and i'm thinking about raising it to about 15 feet. i'm planning to use plants as a semi-permanent hedge. i'm planning to dig up a trench in the concrete flooring about 1 foot wide so i can plant there, and then somehow put a brace somewhere where i can tie down the treess/plants for extra support. i don't want to use the really big plants/trees as they could take out the wall in a typhoon, so my choices are:

1. Bamboo
2. Indian tree
3. Creeping vine + wood/bamboo fence or grid for the vines to creep on.

What do you guys think, workable ba?

tia