Way cheaper than buying wooden letters for everything! Make raised letters for craft projects: print out the font you want and place wax paper over it. Trace letters with puffy paint, let dry, then use mod podge to secure letters to canvas! (great step by step on how to do this, and which paint works best)
Oversize artwork for less than $10. Head to your local office supply store that has an in-house print shop (i.e. Staples) and ask for a black and white "engineering blueprint". It's just a matte piece of (huge) paper with ink, but the print quality is great because it has to print tiny details for architects.