Hydroponics is very simple. You can make a small DIY bubbler style system using a tote & and aquarium air pump & air stones for $20-30. You can make simple recirculating or ebb & flow systems as large as you want using plastic 6 mil poly sheeting to line the tables or beds and also the nutrient reservoirs. (You'd have to be clueless to spend $76k on a shipping container sized system)
Lights are mainly used for secret indoor cannabis growing or to supplement the photoperiod during winter months.
If you get into it don't buy the expensive hobby (marijuana) hydroponic fertilizers. Find an agricultural supply company and get their commercial dry "hydroponic mix". If you're in the Southeast US "Southern Ag" is a good source
https://southernag.com/ . They have a couple of formulas, 5-11-26 is the one I've used. You'll need to add various amounts of Calcium Nitrate and Epsom Salts to the mix, depending on the requirements of your crops. You can make tens of thousands of gallons of nutrient solution for about $50-60, which will be enough for years for a hobbyist.
You'll need a TDS meter & a pH meter. You'll figure out the pH after a while and may not need the meter much after you get things dialed in, but the TDS meter measures the nutrient concentration and is used often. There are a lot of brands, I prefer "Oakton". The larger your reservoir, the easier it is to keep the solution stable.
I have really enjoyed hydroponics. It's amazing to see how quickly the plants grow & also being able to see their roots is pretty cool too.