I bought a Panasonic FZ72 earlier this year, which has one of the widest angle lenses as standard in its class (20mm). I think it cost about £230, but as the pic shows, from the bathroom doorway I managed to get most of the room in view, and it was a smallish bathroom, 2.3m x 1.8 ish if I remember rightly.
I've dug another couple out of an ensuite I've done, its only 1.2m wide from left to right, cubicle is 850mm deep, door is 600mm and you can see floor to ceiling!!
These pics are all just in standard point & shoot mode, so I reckon with a bit of practise and learning how to use the features a bit it'll be well worth the money. 🙂
With cameras - you really pay for what you get. The widest angle cameras are the Panasonic Lumix DMC's. I sometimes use a DMC TZ 30 - outstanding lens - a Leica, but it cost me about £240 a few years ago. As pad shows with his DMC you can get excellent wide angle shots in restricted locations.
If you want shots for a web site, you need to invest in an SLR with something like an 18-200mm lens - that combo will cost you just shy of a £1000. But the quality for web photos is outstanding.
In my opinion the Panasonic can take shots nearly as good as an SLR - and that makes it price look cheap at £240. And its portable enough to keep in your van glove box so you are never without it.
Finally some mobile phones have outstanding cameras - I have seen photos from iPhones that are good enough for websites. I personally bought a Nokia Lumia which has a 41 megapixel camera and takes excellent photos, and I always have it in my pocket. But they don't have the wide angle range of the Panasonic Lumix.