For me, by the time I had 3 pedals I was using regularly it took too long to plug in all the connectors and power transformers (I never run them on batteries) so a pedalboard saved me set up time.
But my advice to you is KEEP IT SMALL. There are 2 reasons for this.
1. A big ass board like a Furman SPB-8 takes up a lot of real estate on a stage. When I had one I had people tripping over it and cussing me out.
2. The bigger the board the more likely you are to feel the need to FILL IT UP. I'm not really much of an effects guy, but I ended up with about 12 pieces on the Furman, many of which I ended up selling because I never used them.
Now I use a small Core board that closes up like a suitcase and is exactly the same size as my gig case that holds all my cables and stuff.
It will only hold about 6 pedals max, so if it won't fit on the board, I don't buy it.
If you are as compulsive as I am, this will save you a small fortune!
The other thing you should know is that once you start building a pedalboard you will never actually be DONE with it. It will forever be a work in progress as you search for just the right pieces, move them around to find the best layout, and endlessly wire and rewire it to make it as neat and functional as possible.
Get ready to spend a lot of time on your knees
