do you want a separate receiver in the shop or just watch what is on in the house? If the former you will need a Sat. grade coax line from a new or existing dish...if the latter just run a coax cable from the house...
If you plan on using an independent receiver in the shop I would buy a cheap dish off e-bay and then you would not need to run any lengthy lines...for standard definition it costs $5-$6 a month for the receiver $10-$12 for high def....but you will need a HD dish (also cheap on e-bay)...unless you connect a telephone line to a Sat. receiver (not required)...the satellite or the company has no idea where a registered receiver is getting the signal from (any DTV dish will work if compatible with the receiver...if you need a receiver DTV will send you one for just the postage (about $20)...it comes with an access card and you just call them up when you are ready to activate the receiver...