1 health care provider listed above who practices in a country other than the United States, who is authorized to practice in accordance with the law of that country, and who is performing within the scope of his or her practice as defined under such law.
Do the math 500 hydrants @ $50 per hydrant = $25000 - OPEX for job Gas, Hotel, Food, Paint, Misc Tools, Repairs Say 25% overhead or $6250.00. This leaves you $18,750.00 - your marketing cost to get the job $3000.00 = 15,750 / 60 days to complete = $262.50 per day for painting a few fire hydrants.
Roughly speaking, 30 days. Honestly, it would be best to wait that long to seal it. However, most people - and for good reason - don't want to wait that long. It's too easy for there to be something spilled on it. If you really want to do a bang-up job, do your first application of sealant after 48 hours. Then, 30 days later, clean the grout with a toothbrush, using a strong mix of bleach & water.