Congratulations OP! The first few years are going to be incredibly hard work, like nothing you have ever known. And then all of a sudden you have 2 teenagers going to college and university. My 2 are 17 and 18. Would I recommend it. No, absolutely not.
Equally my 2 have a bond between them that you would never get if they were further apart in age
I'm not trying to be negative. I've been there, done it and possibly have the t-shirt.
Would I do it again, yes I think I would. It's fabulous. I know you don't have twins, but I found it really helpful to get in touch with TAMBA if they are still doing stuff. You will need a twin double pushchair etc