You can print from the iphone pretty inexpensively. An HP inkjet printer works well for that. You need a wireless printer and a wireless network regardless of whether it is connected to the internet or not (the router itself to create the inside the house network).

However you may be able to get inexpensive DSL service from one of the 3rd party providers. It depends on the area and how far away from the Central Office the location is. Something like DSLExtreme (http://www.dslextreme.com/) is $12-15 a month for the basic service (6mbps) and might work fine for the minimum type of service.