We rented out our FL condo because we couldn't sell it and the carrying costs were too much as we had to move here. I can honestly say that for us, it was not worth it. I hope you have a better experience.
Anyway, if you list it with a Realtor they will take care of all that for you. The expense is usually one months rent if you just want the Realtor to get someone in for you (do credit check, sign the lease, advertise the listing)... Many times you can do it on your own, but it may take a little longer. I am not really sure how you would do the credit check on your own.
Sorry I totally did not answer your question. lol... the post just reminded me of the headaches of renting out my own home. :)