Which is the best electric griddle, I can use at home?

Ebay or

Griddle Pan Electric‎

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Lodge LDP3 9.5inch griddle would be a great choice to use at home.

Yes, Lodge made a nice 20 inch cast iron griddle has bigger surface to cook more food with two side handles to make it easy to move. You have some other options like Presto 22 inch griddle, check out this link for different size griddles and pans with detailed information.
GroomNStyle Top 5 Best Saucepan and Pot reviews 2015

electric griddles have a thinner plate material than gas ones. they are generally less sophistacated and cheaper to make/made with cheaper materials.

This mya be a bit small for you but you said a small house so it's worth a look.
http://www.usfoodsculinaryequipmentandsupplies.com/product/-superior-24-27-27-electric-griddle.do?sortby=ourPicks&from=Search

I use mine for okonomiyaki. This way you cook it at the table and it stays warm and then you eat it!
for more about how to make this:
http://www.closetcooking.com/2009/05/okonomiyaki-japanese-pancake.html

well this is different, but sounds like fun. I would just Repair the gas griddle you have. from the sound of it you need to replace the 3 or 4 tstats that control the griddle. If you are in a Metro area you can find a dealer for Robert Shaw and get the parts you need. but you may also start at http://www.garland-group.com/. everything there will be newer but you will be able ask about where the data plate is and then get parts lists. call a small comercial kitchen repair company and ask for help there too.

You can use it like an electric stove; just put the fry pan on the griddle part and turn it on high.

Hi there!

When it is warm, use a spray cleaner and paper towel to wipe up the grease.
Wooden or non-stick spatulas make excellent scraping tools to take the worst off first.

Use paper towel to wipe up.

For really stubborn deposits, use an oven cleaner - and cover with plastic film. Check in 1 hour, and clean as above.

Soda Crystals dissolved in hot water are excellent at cutting through grease, but may affect aluminium. They work out cheaper than many commercial products.

Hope this helps you.