You have quite a multitude available to you, with a pretty good range of prices too. Some are designed to work with specific cameras and others are simply the RF equivalent of optical slaves. I use all manual strobes in the studio as well as Sunpak 544 hand held's and found some really excellent ones on Fleabay for less than $40. It included a transmitter and 2 receivers. They are very small, and I have found very reliable out past 100 feet if there are no obstructions between you and the receivers. You can also use them in separate rooms if you are going to do stuff like interior room shots. The transmitter uses an inexpensive 23A battery and the receivers use 2 AAA's. The battery in my transmitters have lasted me a good year and a half wth fairly heavy use. The transmitters and receivers also have dip switches (2 on mine for the handheld strobes and 4 for the studio strobes), like your remote garage door opener, so you can key them so that you don't get interference from other devices. The reason my hand held ones are different from my studio ones is the fact that the studio strobes have a larger PC cord male pin than do the hand helds so the two are not interchangeable.
I would check out Fleabay first and see if you can find something that will work best for you.