To be able to make profit from selling your trials frame you need something different that no one else has, expecially to compete with Rockman, Zoo ect, considering Rockamn hasn't been around long at all, they have produced some amazing bikes.
To be able to have a chance to compete in the market you need to offer something no one has done a outstandingly strong frame or brand new design to trials that will attract us all.
So far your frame looks very similar to existing products. Which customers will buy from already existing companies because they know them and are reliable.
If you are to sell, I would focus on marketing to get well known.
That's what I think.