A wham bam magnetic plate for the build plate. There are other brands too, I have wham bam and know it’s good so I’m recommending that. Don’t even do a print without one.
Get water washable photopolymer. Elegoo sells it under their brand, works great.
I don’t think the washing stashing is needed, it’s just a bucket. You can just rinse prints with water in the sink. Wash the resin into a bowl, cure the washed resin in the sun.
The UV curing station is great cause it cures prints evenly and in minutes but it’s not necessary. The sun does the same thing, but weather, cloudy days, etc. results can vary. I have the elegoo mercury curing station and it’s nice.