If its all about price and not conveinance then your probably going to want to go with the Winegard Carry Out
. All you do it connect the cable and the coax cable, set it on the ground in a resonably level spot,and auto positions for a signal. You will need to signup with one of the satellite companies like dish or directv and get a receiver box as well.
Read more about the specifics Carry Out Quick Start Guide
If you want a more integrated and permanent satellite then it will probably be alot more than $700 and will require either a technician or a very capable person to install it. You can always go to a camping world or try to find a local shop that will do it for cheaper.
If all you need is service and already have the equipment you can just contact the satellite providers and get your service connected. Im not sure as your question wasnt all that specifc