All depends on what equipment they drop.
Some co just drop the modem that you then need to hook a router to iin order to provide access for multiple machines.
Some will drop a wireless router as well.
200' is a good distance so you will most likely need a wireless in the house and in the shop.
A lot will depend on the location of the unit in the house.
Is it on the same side of the house as the shop?
Close to or near an outside wall?
Wait to see what equipment you get.
If they drop a wireless router then go and pick up a second repeater or access point of the same brand.
If they only drop the modem then get 2 wireless units.
You may want to hook up an parabolic (directional) antenna to the main router and mount it outside the house pointing at the shop. That might allow you to get away with one unit.
SInce I know you love to DYI check out these links
http://www.turnpoint.net/wireless/cantennahowto.html
http://binarywolf.com/249/
http://binarywolf.com/249/wifi_basics.htm