- some parts are sold in multiples, so you'll have to buy several even if you only need one for the build
- I ordered the electronics from JLCPCB where the minimum order quantity is 5 (minimum assembled is 2). At a quantity of 5 assembled, the LED board is ~$12/board and the mainboard is ~$41/board. If you're comfortable with SMD soldering, you can order bare PCBs and parts and do it for much cheaper by assembling only one of each board. You can find some more details here: https://oasis-terrarium.com/docs/electronics/#how-to-get-them. And a history of my JLCPCB orders including costs here: https://oasis-terrarium.com/docs/electronics/#pcb-order-history
- custom electronics: $53
- 3D-printed parts (~600g of PETG): $12
- other parts: $46
- acquiring/assembling electronics: this can vary a lot depending on whether you buy assembled or do it yourself
- 3D-printing: depending on your printer, maybe 2 solid days of printing
- waterproofing 3D-printed parts: takes ~15 minutes to do and 24hrs for the epoxy to cure
- final assembly: 30-60 minutes
I'd recommend @SerpaDesign on YouTube as a great source of info on terrariums - he's got quite a few videos that cover this, but here's one to start: https://www.youtube.com/watch?v=7Lg4tzkHgVo&t=1s&ab_channel=....
The main thing to keep in mind is that terrariums are high-humidity environments, so plants like mosses, ferns, and orchids will do well. Plants that prefer a dryer climate like succulents and cacti will not do well.
Another consideration is lighting - some plants want more, some want less. This terrarium is capable of fairly high light output, but can also be set to any level you want. However, you'll want to select plants that want a similar amount of light so they can co-exist with the same light settings.