Our deck has an opening with a couple of stairs down to the lawn and I'm looking for a gate or something to keep the deck enclosed so I can have my kids play on the deck and be comfortable with them playing out there while I start dinner inside, etc. There are plenty of windows and a large deck door in the kitchen so I can easily keep an eye on them from the kitchen but would feel more comfortable knowing there isn't a way to get off the deck. I guess I'm looking for something like this http://www.amazon.com/Cardinal-Gates-Outdoor-Child-Safety/dp/B00CE8C7SO but preferably more affordable!

Any suggestions for other outdoor gates or something else I could try? TIA!