I feel it is so important to make products in small batches. You are able to monitor quality and able to sell a quality product. If a batch doesn't cooperate and come out perfectly, you haven't completely lost. If you stick to making a small batch, 9 times out of 10, there are no issues!
When I make my bath bombs, each batch only produces 7-8 bath bombs. Each batch takes me about 15 minutes to mix up, then 30 to pack in the molds and the dry time is anywhere from 2-5 days depending on the weather. Living in GA, I have to battle some crazy humidity. I purchased a large dehumidifier and it has helped a little to get them to dry and not activate. Once they are all dried out, I package them up with shrink wrap to protect them and seal in the scent and label them with the date that I made them.
With the candles, I pour 4 10 oz tins with each batch. Once they are poured, I allow them to set up over night. Then, if any have sink holes, I fix them with my heat gun, trim the wicks, lids and labels. With the type of wax that I use, they typically take 3 days to cure so you have a great scent throw when they are lit. Also, the type of wax I use is slow burning and last longer. I try to typically leave enough wax for a candle for myself so before I put my name on it, I get to try it out first to make sure that the right ratio of fragrance to wax was used. Bonus, I get to keep a candle too, and you can never have too many! LOL!