Have you already sent/given it to said shop for spraying?
If you're planning on wrapping it in sniper tape anyway what difference does it make if you don't get it done before the weekend?
There's so many variables involved with work load, type of finish you ask for, how much needs disassembling that any estimate you get here will be total finger in the air guesswork and most probably wrong anyway!
Why not just get a can of Krylon and do it yourself?