I want to make sure I undeestand the rukes for making a Longsword +1.
First, make a Fine longsword.
AG426
Longsword is 20 GP and fine adds another 25 GP. So fine longsword is 45 GP. Make a 20 DC Craft check and it takes 2 weeks.
TT364
Crafting the weapon +1 is 250 GP plus 20 GP for longsword...