Broom: make your own! I have both a large and small besom I made. You can even find scented yarns to tie with (though I’ve found a tightly pulled rope to be best).
Wand: a stick! Or you can get creative with cutting down a dowel and decorating it.
Censer: you can get a stick incense holder for $1 at the Dollar Tree. Same with a cone incense holder for $1 at some walmarts. Falling that, a small bit of folded aluminum foil works for me and my cone incense when needed (just make sure it’s stable and flat!)
Cauldron: a metal bowl might be suitable? I actually found a metal cauldron at a thrift store for $2, but it took a lot of looking (and I very rarely use it in my work honestly).
Athame: typically black handled, you can get a black handled paring knife at Walmart for 88 cents. It doesn’t 100% fit the description but it works if you don’t have much money.
Chalice: thrift stores. I got mine for 69 cents at goodwill.
Pentacle: draw one on paper, or you can get a piece of wood or metal from a craft store and draw/engrave/burn it on that.
Book of Shadows/Grimoire: tumblr! Or if you want a physical copy, a lined notebook or blank sketchbook works.
Bell: craft stores. You can get all kinds of bells there, choose whatever feels right.
Bowls: again thrift stores. I got my offering bowl for 49 cents.
Snuffer: mine was a gift, but I’ve seen some at thrift stores for $2 and less. You can snuff any fire with something fireproof and that which blocks oxygen to the fire. I used to use tops to old jar candles, depending on the size of the candle.
Mortar & Pestle: mine was $2 at goodwill (after months of looking through thrift stores). A makeshift mortar & pestle could be a small ice cream scooper & a bowl. Other than that, there’s a $6 - $10 white set on Amazon if I remember correctly.
Candles: birthday candles are 24 for $1. Seek out pagan shops for other candles, my local one sells chime candles for 30 cent each. Thrift stores also have candles for cheap sometimes… Just make sure to cleanse them and look for non burned candles. Thrift stores also have fancy shaped candles sometimes. Also, white candles are catch-alls and can be substituted, so don’t think you need every color of the rainbow off the bat. Walmart sells 50 white tealights for about $3 where I live.
Candle holders: my only advice is for birthday candles, which is metal sewing bobbins. For chime candles I have chime candle holders, and for taper candles and votives, you can find holders at thrift stores and dollar stores. Walmart also carries votive glass holders for around $1 each.
God image/goddess image: print out a picture from the Internet or copy a picture from a book at the library or friend’s house. Walmart sells picture frames 5x7 for about $1 (though I prefer hobby lobby’s predone frames more personally, but they cost a little more)
Knot magic: you can get embroidery thread for 15 cents or so at craft stores, and it comes in a variety of colors. Baring that, you can also get cord by the yard at craft stores for cheap too.
Note: a lot of craft stores have 40% coupons on their websites, so you can save even more.