Power tools vs manual tools

[XemaSab]

So I'm going to build some planter boxes for the yard.

Admittedly, I've never built shit before, but I think they'll be easy.

There are going to be three of them, each about 12 feet long, 3 feet wide, and about 3 feet tall. I'm hoping to use pressure treated 4x4s for the corner posts, with redwood for the sides (haven't decided the dimensions for those yet). They're going to be open at the bottom and I'm going to put sand around the bottom edges for drainage. I'm going to line them with plastic sheeting to keep the wood dry on the inside. I think it's going to work out.

So the question is, should I get a power saw, or will a hand saw get the job done?

Thanks! :hi:

ps I don't want to spend my life sawing.