Originally Posted by Buda
Do you have any painting experience at all?
Do you have any sign
painting experience at all? It's not at all like painting a canvas.
Materials: Do you know what materials to use for this specific installation? What is the wall made of? What kind of paint? What compensations need to made for lighting?
Tools: Do you have the necessary tools and equipment? Ladders, scaffolds, drop cloths, measures, not to mention brushes, etc.
Permits: Does this need any kind of permit? Are there are any restrictions to access the office building with your equipment? In my area, you can't bring in a package bigger than a breadbox without a building permit, never mind hauling in ladders and scaffolding.
And as PD mentioned, Insurance.
I am not an experienced sign painter, so I would subcontract the production of the job out. Get quotes from 2-3 pro's, add their production numbers to the project estimate. Save a pile of hurt.
My 2¢ FWIW