disaster plan for small shops

For 12 years this customer avoided any talk of a DR plan. 
Last night an 18 wheeler took out 3 power poles at the front of the site,
and a city block is without power & phone. Barely missed actual building.
UPS has reached it's limit (about 4 hours) and the entire computer room is out 
(i5, 3-win servers, router, etc). This customer also in prime 
hurricane location - SE Florida within 2 miles of coast.
What is startup & annual cost of hot site? 
How many do building generators vs remote site (or both)?
This co heavily dependent on iSeries web site for order,
and web access from within office. 
Whole company gross less than 5m/yr (18 employees).

jim franz