I don't do tub's, heating lamps or garage anymore (but I would do the garage if I didn't have a brooder in my coop.) Do you have a coop yet?
http://www.backyardchickens.com/t/956958/mama-heating-pad-in-the-brooder-picture-heavy-update
http://www.backyardchickens.com/t/956958/mama-heating-pad-in-the-brooder-picture-heavy-update