I think to myself alot of people dont fully appreciate just how much the energy demands are when training with weights. You are asking alot out of your body when you train with weights, ESPECIALLY, once the intensity picks up. The #1 way to generate ATP when lifting is anaerobic glycolysis. Glyc- refers to sugar, which you will not be gettnig enough of if you plan on doing 30 grams of carbs from vegetables. Not only will training get extremely difficult, your brain is going to have a fit with you because you are not giving it the 3-4 grams of glucose that it asks for every hour, every day.
Youre going to start running on proteins and fats, and these 2 macronutrients, you can send them through anaerboic glycolysis (like glycerol from fats and gluconeogenic amino acids) but the pathway will not perform anywhere near as beautifully as it does when you actually eat carbs!
Dont be afraid my friend. Carb out before and after workouts. I even drink gatorade during workouts to keep blood sugar high. If you want, after you have eaten your post workout meal with carbs, then yes, chill out with them the rest of the day, and chill with them on off days. This is called the targeted ketogenic diet, which you should read up on.
Also, it might be possible to bulk with 30g of vegetable carbs if you were on AAS. I doubt you are though, so you need to eat carbs for your workouts.