4 weeks to flower?
What strain are you growing? Most will take at least 2 months to flower and I veg for the same amount of time (bigger plants = bigger buds). Of course I have 9feet of height in my grow area, so I can veg longer.
How much room do you have in your grow room?
The way I cycle my perpetual growth:
I can fit up to 6 plants in flower and 6 plants in veg. My current strain takes 8-9 weeks to flower, so that's how long I veg for. When I cut down what's in flower, I clone from what's in veg (1 trimming from each plant). I leave the new clones in veg while I transfer their moms into flowering. Once those are done budding, I transfer the clones I took into flower and take a trimming from each of them... and the cycle repeats.