CharGriller Pro is a good choice for a horizontal! You will have to make a few modifications, but it's still a good smoker for the money! I have made many people happy with my little smoker.
The cost, including modifications was about $250.00.
However, I agree with RickW! Save up and buy a good smoker! But......you want to get started ASAP, so since the wood smokers have an SFB, it's not a bad idea to start out with an SFB (Side Fire Box) smoker.
Let me know if you need help with your mods....I can give you some low budget modifications that make a huge difference.