@CapricornFarm, I have an amalgamation of random equipment, some good, some bad, from all over. I do what I can with what I've got on hand or whatever I can borrow or is free. I'm NO expert on equipment. I just don't have the experience with a wide enough variety of things. (Except for seed cups! Lots of thoughts/experience on what's best there if you wanna hear! I have tried a LOT of gimmicks over the years.

Some good, some not.)Bbut I can give you SOME info....
Shelves;
I have a shelving unit I got from Costco. I have no idea what brand it is any more, it's whatever they stock. They have them off and on. Costco often carries shelving units perfect for seeds and hanging lights for anywhere from $35 to $100, depending on size and quality. Mine is a thick plastic $35 5-shelf one and I think it's... OK. I wish I had paid more and gotten one with thinner actual shelves and fewer shelves but wider. The shelves are a few inches thick with criss-crossing hollows I tie my lights to, but space is at a premium everywhere for me (small house, 1/4 acre lot) so every inch counts around here. It's bad for tall plants that have to have a very early start, they get too tall, but it is otherwise a VERY good shelving unit for the price! (Costco is a great resource for me, always impressed with their house brand products and everything they stock.) I'd say get a shelving unit that gives your plants enough space to grow. Go for a wide 3 shelf or something if you can spare the square footage. I will be making my own this year for the extra needed space. Just PVC, some plywood and a saw.
Lights;
My lights are a mish-mash of heat lamps, lamp lamps, aquarium lamps, plant lamps, reptile lamps, all with whatever bulbs I have that suit my needs mushed into them. I will say this, dome lamps are great for small concentrated spots, but otherwise don't use animal equipment if you can avoid it. Just go for fluorescent shop lights or plant lights. LED bulbs are also your friend, especially if you BS your lamp set-up like I do. You can easily put a "150 watt equivalent" LED bulb in a 75 watt lamp socket because the actual power drawn is more like 20 watts. Insanely bright, insanely safe, lets you produce more light without upgrading your lamp. Look for the actual power draw on LED bulbs, and you will see they are amazing. They provide INTENSE light, pretty good for plants, at a tiny price.
Heat
I have a Viagrow brand seedling heat mat and I *LOVE* this heat mat more than any other gardening equipment I have EVER gotten. It's my favorite item in my whole setup. It was bought for me as a present from
Amazon and I wish I had a bunch of these things. They are SO wonderful, especially if your house is cold like mine. They are fairly inexpensive for the tiny ones, the big ones are more, and they are worth every penny. Reptile heat mats suck, btw. Don't use them. They break very easily. Otherwise, I use dome heat lamps for my heat-loving plants and I dislike them. The plants grow into them and get burnt. (As a bonus, you can very safely and easily brood chicks under the Vigrow heat mat during your off season! Much better than a heat lamp!)
Lastly, make 100% sure everything you have (especially heating devices) are plugged into surge protector power strips or something good like that. Starting plants is often a big power draw. If something goes wrong you don't want your pots melting or your heat lamp burning down your house. It's like $15-$25 and it could save your everything.