For the same cost of bedsheets you can get yourself some bottomweight for pants, and it will last you years. Linen is like $7 a yard, 2 yards and you have yourself a top. To get a high quality bedsheet that doesn't look like crud, you'll be spending atleast $15-$20 for it.
You can estimate most garb costs around $25 in materials alone. That includes top and bottom.
Looks pretty good Smithy. The trim/edgings are what made that whole tunic, looks really legit.