First, Kassii has to animate 10 1HD drow skeletons. That normally costs 250 gp, but with Blood Money it costs a few points of damage and 1 point of strength damage.
next she attaches them to the Gug with a scroll of Make Whole (150 gp)
After gluing the corpses to our Gug, it gains 3 Construction Points (CP)
To make up for the loss of it's Bite attack, I'm adding Extra Attack (claw). (1 cp)
To make up for it's loss of all it's natural armor, I'm adding Metal Armor (2 cp)
Finally, Kassii casts Animate Dead again (with a 50 gp material component cost, but not having to double the effective hit dice this time). So, she uses blood money again and loses another 2 strength.
So, by the time this monstrosity is done, Kassii has spent 150 GP, cast three 1st level spells, three 4th level spells, taken 3d6 damage, and 5 points of strength damage.
Then she takes a nap.