Almost-free Cutting Mat

While we were visiting my parents in March, I was cutting fabric for projects I was working on, and I said to my mom, "What I really wish I had is a cutting mat and rotary blade. That would make this so much easier than--"
Here's where she said: "Well, why didn't you take mine when I offered them to you??"

I stared.
"You have a rotary blade and cutting mat?!"

She did. And she gave them to me. Thank goodness we drove so I could get them home!

I used a JoAnn coupon and got a new blade for about $5.
I also picked up a couple of white paint pens, because of this:

The mat was just blank. No measurements. That really made it a LOT harder.
Oh, and I bought one of those big, plastic rulers people use on the mats.
After a good few (tedious) hours of carefully drawing lines, I had this:

(Darn sideways picture.)

Though I haven't priced it exactly, I imagine I probably saved at least $50.

Is it perfect?
Not even close.

Is is a bit ghetto?
Definitely.

Am I happy with it while I'm on a very limited budget, and loving how much easier my fabric cutting is?

Heck yes!!