There are many ways to accomplish what you want to do. For basic building a table saw is not needed, but a good chop saw and circular saw are.
My preference is for a worm drive circular saw, for example a skill mag 77, and a good sliding chop saw like a bosch or dewalt, I like the bosch. I have looked at the ridgid sliding chop and it looks like a good saw, but I have no experiance with it.
With a good straight edge and sharp blades this combination will be the most flexable.
I do have a table saw as well. I use it all the time, but not for building, more for furniture or high quality work.
Buy good tools they will pay for themselves.
I do not have a warm fuzzy about Ryobi, but that is only my opinion.
No matter how you go get good support, a fw saw horses etc.
Good luck, have fun,stay safe.