Check out this link on retained ownership:
http://animalscience.tamu.edu/ansc/publications/beefpubs/L5246_retainedownership.pdf
Or do a search on retained ownership. Most of the larger feedlots have a page on their sites. This one is typical Ansi PDF format, but its a fairly quick load.
The Ranch-to Rail type programs that Frankie talked about are a good idea to try out first. They'll let you feed cattle on a small scale to see if you like it. One bit of advice on those---most producers will pick out their best 5 calves to send. These will usually be the oldest, growthiest, earliest maturing calves that look the best. If those work good on feed, you may be surprised when you send your entire calf crop and have different results with grading/feed efficiency. Don't send your best 5 calves. Try to choose 5 that represent the
average of your calf crop.
My advice is that you think about feeding cattle when calves are cheap. When they're high like they are now, don't put 'em on feed, put 'em in the bank. JMO