Insurance guy here. Today's replacement cost of your building ($200 per sq ft MINIMUM) is $1 mill based on 5000 sq ft. Based on the occupancy of the building I don't think a "standard" carrier like Travelers, CNA etc will write this. You'll likely wind up with an "excess and surplus lines" carrier like Lexington, Lloyds and hundreds of others. Pricing would be somewhere around $7k here in NY at $1 mill coverage. Contact your local larger independent insurance agent for this. They are your BEST resource for this stuff. Check out www.iiaa.com for a list.