Solar Power would be good to supplement your electricity supply. I did a little research:
2 batteries of 200Ah maintenance free = 66k
1 Xantrex 2424 inverter = 130k
1 Charge controller SUNPOWER10 12v 10amps = 5k
4 solarpanels of 30Watts each = 15k x 4 = 60k
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Approximately 260k
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If by day, you run your fridges and TVs run on Solar. And at night you run the appliances by electricity, your electricity bill will be quite less.
Also if you live in a 'high security need' area - you will need backup electricity to keep those lights/cctv on and ring the alarms in case of anything.