Brandonv19,
Take it from me. DIY on a 29 gallon will get tedious after a while.
I did DIY for almost a year. It was a nightmare, but, I couldn't afford a pressurized system at the time.
I bought the Hagen co2 setup and used it first on a 20 gallon long. That wasn't so bad. Actually, the DIY worked very well. Unfortunately, when switching to a 29 gallon, I couldn't use the reactor anymore (Hagen co2 setup is for 5 to 20 gal. tanks) and so I started using 2 (2) liter bottles, DIY yeast mix, and the ladder to get better results. There was a lot of co2 fluctuations. Finding the right yeast mixture took a long time, and the mixture only lasted about a week (for me, at least). You have to fiddle with the thing to get a good batch to work (some people have been successful at this). When you do make a good batch, you should see bubbles within a few hours. Don't use Hagen's yeast. Most of the time, their yeast is just crap, and on top of that, expensive.
If you can, start saving for a pressurized co2 setup. It'll save you a lot of time and money in the long run. I use pressurized, and the co2 is always consistent using the Hagen ladder.
Before injecting co2 into your tank, you should first test for Kh and Ph. Your Kh should be 3 or above. Anything below 3 will cause ph swings that can be harmful to your fish. You should understand the relationship between Kh and Ph in order to achieve good co2 concentration for your plants (depending on wpg), but safely for the fish.
HTH
Lissette