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We need a fence to keep the kids in!

As fast as possible we would like to fence off either side of our home with a simple aluminium fence with 2 access gates. One access gate has to be wide enough to fit a ride on mower. The first 2 pics show what sort of fence we are looking at. Don't want to spend much money at all as we are moving house in a year. And the next pics shows the 2 sides of the house we want to fence off. One is on concrete driveway the other side is grass with a path. If you know of another fence that will be cheaper than this we'd be glad to hear your thoughts. Just need something asap.