Hello, this upcoming spring/summer I am planning on raising and slaughtering my own meat chickens. I would greatly appreciate advice on what supplies I will need, what type of chicken I should get, etc. thanks!
The problem with answering this is that you have way too many options. We could write books and still not cover them all. The more you can tell us about your goals, plans, and conditions the more likely we can give suggestions that suit you.
How do you plan to cook them? The age you butcher them has a lot to do with how you can cook them. The younger they are when butchered the more options you have. When they get older you are limited to certain methods.
How important is size? There are only two of us and I can get two meals out of a smaller chicken, the second meal usually being soup. For some people size is very important. I like big too but for me that is a nice to have more than an absolute necessity.
Is freezer space a limitation? If you get Cornish X and to a lesser extent the Rangers they pretty much need to be butchered when they are ready. Dual purpose can be stored "on the hoof" for longer.
If you raise Cornish X, you keep them for about 8 weeks, butcher them, and forget about raising them for a while. It doesn't tie you down taking care of them that long. Rangers tie you down longer, dual purpose feels more like a long term commitment.
Are you OK with buying chicks to butcher each time or do you want to hatch your own? With Cornish X and the Rangers you pretty much buy the chicks each time. With dual purpose you can buy or hatch, but hatching requires a long term commitment and generally an incubator if you are going to hatch efficiently. But you get the benefit of eggs to eat. What do you do with the pullets that hatch? There are a lot of different ways you could approach the dual purpose.
How do plan to feed them? If you are buying practically all they eat, the Cornish X and to a lesser extent Rangers are very cost efficient in turning chicken feed into meat. Dual purpose are not nearly as efficient. But if they forage for a lot of what they eat the dual purpose aren't that bad.
Your general climate and what time of year you are thinking about doing this could have an effect. You did say spring and summer but what is that climate? Are these for you to eat or are thinking of going commercial? Do you have laying hens?
As for equipment are you getting baby chicks? Probably. Will you brood in your house or outside until they get big enough to not need a heat source? If you are using Cornish X or Rangers you don't need a coop with roosts or a nesting box, just a shelter for protection from weather and predators, though some people like very low roosts for Cornish X or Rangers. If you purchase dual purpose cockerels you probably want a shelter with roosts but won't need nests. If you get and keep females you will want nests too. As I said, too many options.
Knowing nothing about any of how you want to approach any of this my general suggestion is to get a few Cornish X and try them. Then do Rangers, either at the same time or next time. If you are ever happy go with that method. If not, try dual purpose. Find out for yourself what suits you better. That way we can concentrate on helping you with one method, especially if you tell us your plans and what you have to work with.
It sounds like it can be confusing and intimidating, hat's the problem with too many options. But once you narrow it down it does get pretty simple.