I have both a lightbox and a backdrop.
What you need depends on what you are photographing. My lightbox is barely large enough to shoot a 12-inch item, and sometimes 12 inches will not fit so it is really 8-10 inches. Buy the big lightbox. You will not regret it, but if you buy the little one, you will regret it when something will not fit the first time.
Neewer 36x36 inch/90x90 cm Photo Studio Shooting Tent will work for small things.
You can cobble something together that will work from poster board and boxes, but what will you do with it after you are done shooting. The lightbox will collapse into a small package the is easy to store.
Lighting is the name of the game in photography. If you haven't got the lights right, you are not going to get good results. Please don't waste your money on the little tabletop lights they sell on Amazon. I used LED Floodlights in clamp-on lamps for a while. It worked, but they were a pain to set up and adjust. I still use the floodlight bulbs, but now I use light stands and white umbrellas to diffuse the light. They are easy to adjust, and I can use them anywhere. Light stands are cheap. The LED flood light cost more than the stands. More light is better. Natural light can work, but you can't control it.
I'm going to ne using this today:
Aluminum LightPhotography Tripod Stand with Case - Pack of 2
Emart Light Bulb Stand, E26 / E27 AC Socket Lamp Holder with Umbrella Holder
Neewer 2 Pack 33"/84cm White Translucent Soft Umbrella for Photo and Video Studio Shooting
GE Lighting LED Bright Stik Light Bulb, 15-Watt They don't sell the flood lights I have anymore but these will probably work fine and if they don't you can use them in your shop or home. Just make sure you get daylight LEDs 5000K-6500K and as many lumens as you can.
If I were to do it today, I would skip the tent and go with a white fabric backdrop, light stands, and white umbrellas.
One tough thing for me to learn was that white backgrounds are not white. They are pale gray. Paper is the same, but it gets graded according yo how white the paper is. The whiter the paper the more it costs.