It sounds like you need much more flower than I do. Normally, I only need a few grams per week (blessed with a sensitive system and I use a vaporizer). With 4 ounces, I’m set for a year.
I always encourage people to figure out how much they actually need, assume 1 ounce per sq ft of flowering canopy per 4month period, and go from there. In your case, setting aside your vegetative space, you can assume 1 ounce per sq ft every 3 months. My estimates include a generous safety factor to account for mistakes and crop loss. Optimally, you estimate 1.75 ounces per sq ft every 2 months (coco coir or similar hydroponic medium, optimal lighting, ambient CO2, cloned genetics).
If you haven’t looked into automatic watering, I’d at least research it. It would suck to have to pass on a vacation because you can’t leave your plants. There are passive systems from a company called Blumat. I wouldn’t say they’re optimal, but they’re reliable and affordable. I’d look into using them to maintain mother plants.