Shop local for candle-making supplies when you can. I do as I save a ton in shipping.
Supplies can get heavy and you save money when you purchase in larger quantities. Purchase what you can afford and use. Some products have a shorter shelf life.
I also get to meet the team at the supplier locations and can ask questions about their products. Most websites have support. Do not be afraid to ask. They know the products they sell more than anyone.
A community favorite is the Dollar Tree candle holders so I have an article on those –> here.