Let’s do some math.
A cycle will probably average 4 months. You can’t control it very well with autos, but I think it’s safe to estimate an average of 4 months seed to harvest. We can also estimate 1 ounce dried flower per square foot of light coverage.
If you want 4 months of supply, that’s 2 ounces, or 2 square feet of canopy. Very doable on a small budget.
The tricky part is you want a tent that is just big enough, because the light bounces off the walls and close walls are essential for efficiency. But the small footprint tents tend to be short too, which isn’t ideal. You might want to look at an appliance store for a refrigerator/appliance box that you can seal up and adapt. Or buy a cardboard box that’s 1.5’ x 1.5’ x 6’. It will some work, but you can get cardboard for free.
For lights, I would browse the HLG lights at Rightbud. You only need about 50watts of HLG light in the 3k spectrum. The HLG 65 is the right wattage, but the 3k is hard to find. The HLG 100 can be found on amazon in 3k, but it isn’t dimmable out of the box. @dbrn32 can you use an inline potentiometer to safely dim the HLG 100?
You’ll need an in-line fan and carbon filter. You can go with a 4” diameter system. Features like thermostatic control are nice. Worth the money, IMO.
You should start with 1 plant and a 2-3 gallon pot. This is my opinion.
You’ll need incidental things, like a fan to move air, soil/soilless medium/nutrients/optics/pH testing. My advice is to use a quality bagged soil and ignore pH of your tap water. If you plants start looking weird, but a Hanna meter.
Personally, I think $700 is a good budget to play with, so I’m cutting corners with my recommendations.
Hope this helps.