help!
got an old trailer that has lasted me well but has seen better days... most of the metal frame is sound but a box section at the front has rotted away and now makes it un-towable

I have stripped off the wooden sides and base (marine ply) but now need advice... is it possible to repair??? how much clean metal do I need to attempt to weld on a new section??? will a welded section ever be strong enough to carry the load??? or should I just cut it all up with my angle grinder and take it to the dump???
I can take a pic and post it up if I can find someone to give me an 'expert' opinion