heeeellllp please lol

I'm in the process of building a 1000cc trike and i am looking to build one of the t drop vans but cant sus out which is going to be better for me and my towing requirements, as in what size type of construction would wood be better than ally whats the best thing for framing strength it needs to be small and light ??? do yu see were I'm come from
i was looking to do the Roswell but flicking throw one of the members web site i spotted some thin really nice then a saw something alls made from polished ally (English). so here i am bloomin lost. iv completed two years worth of boat building skills from collage so the bit were i put this thing together is not a prob. I'm probably better to stay with wood but i do like that ally look.
there is so much info i dont no were to start.
im looking..
thanks al if you can advise.....

there is so much info i dont no were to start.

thanks al if you can advise.....