Get some pins.. pin it to see what it lools like... If it looks ok, then the only other thimg you have to worry about is the stitching, and most if that is hidden...

Sleeves usually require you turning the sleeve inside out and looking for the stitchimg that has been redone... rip it and the sleeve suddenly becomes easy...

$100 is probably 3 or 4 hrs of a seamstress... You know what it's supposed to look like... So youre halfway there...

Start with the patch pocket one... And even if you screw up you'll learn a lot... Worst comes to the worst, as was said youre out $5 and some time...

Oh... and plan to sew by hand not a machine...