For the use you describe, electric would be sufficient. It will be less powerful and a bit slower. I have a gas unit I used in my business before I retired and it works very well. If I had to replace it for home use I would get a high end electric unit not another gas unit.
In 120V countries an electric one has limited uses. I have both. The electric one is good for smaller jobs that don't need the volume and pressure of a gasoline powered one.
In 240V countries you can get powerful electric pressure washers. You can get them here too but they are commercial models and very expensive.
My CleanForce 1800 electric (about $100) works fine for anything I have nee ded it for. I've used it to clean siding, entry mats, and a grouted bathroo m floor. After a couple of uses, the hose burst and, although I had purchas ed an extended warranty from Home Depot they refused to honor it saying the hose was not warranted. I contacted the manufacturer and they sent me a wh ole new unit. You want to match the pressure to the job. Too much pressure can cause dama ge to siding, wood decks, etc.
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