Sorry I didn't post about total cost so here is a break out of what you might spend building your custom rod.
If you want a St Croix blank look at their website and take 20% off St Croix’s price
Guides range from 12 – 35 per set on long rods
Handles and seats from 12 – 30
Laser engraving is 5 per line not letter
Classroom supplies and instruction 25
About 150 will get you a sweet rod