yeah in blueprints you need similarly declare variables, create functions or macros, but calculation intensive stuff can get really messy because of the lot of nodes...
if you want to make a professional game you need a team, else you need infinite time just in the case of my RTS project except if it is really simple both in graphics and programming.
beside my project I joined a team where dealing only with AI, but also had to dig into animation, networking, version control, and a lot of other areas. luckily, the editor tools make it really easier, and you can reuse the knowledge later in other projects, not like when you work with project specific custom tools...