>>>It's worth pointing out that extended/widespread outages may include your ISP's facilities, either in your neighbourhood (e.g. those grey metal boxes you see on concrete pads) or their central office. Some of those may be backed up with their own UPSs or generator, but you have no way to know. If those lose power, you lose service, regardless of how much runtime you have in your local UPS.
>>>
>>>UPSs are also useful protecting against brief brownouts or spikes/surges, and can extend the life of connected equipment by isolating them from those issues.
>>
>>IMO the next step should not be a stronger UPS - it should be a small generator, which can give you several H if you depend on working from there. Over here we had 2 outages last year in our and parallell street, each over 6H, due to cable work. Cheap me picked up laptop, tablets, Qi loader and a bottle of champagne, called to make certain at other place current was available and went there - that option not always an answer, but there are hotels and restaurants you can go to if deadlines are looming ;-)
>
>My next door neighbor had a generator installed at his house (at the tag of about $10,000, this is US-comma, not European comma :)). A couple of weeks ago we had a power outage. So my wife and I decided to take a walk and as soon as we left the house we heard the sound of his generator. To me this is an overkill, unless you are running a hospital or a critical care facility.
>I hear that Tesla is working on a battery type generator for residential use (not solar) and it will be considerably less expensive than the generator similar to the one my neighbor had installed (gas fired). Then, maybe I will get on.
>For now a UPS for 1-2 hours will do.

10K is not the price range I considered ;-))
You can get 1 cylinder generators for less than 0.5 (american dot) K$ and below and still be in HP above the easy to port camping generators. You need about 3KW to run your computers and comm gadgets, freezer and fridge while still reloading UPS battery.

https://www.amazon.de/Stromerzeuger-Generator-Dauerleistung-Gartenbereich-Campingaktivitten/dp/B01HKDP0KY/ref=sr_1_4?s=garden&ie=UTF8&qid=1505043726&sr=1-4
http://www.technik-handel.com/benzin_stromerzeuger.htm
(scroll down a bit on second link to see fitting range)

Washing machine, air condition and electric stove should wait for regular current, but it should be possible to get a hot cup of coffee or tea.