A number on my German colleagues have taken people in over the last week - most of them are mothers with children but one guy has taken in a single woman and her elderly mother.
I think it has been relatively informal there in that there is no govt financial support or central scheme in place yet. They offered via the local town hall - they are in Berlin so thousands of refugees arriving every day. The Germans and the Poles don't have time to build an ideal system - they are just getting on with it. There will be some bad experiences I am sure - but are they going to ask hundreds of thousands of refugees to just hang on for a bit while they design and implement some. What other choice do they have? The colleague I spoke to said it was going ok so far in week one and his kids were quite excited to have similar aged children staying with them. am sure there will be awkward moments but that's not the end of the world.
Not all Ukrainians are penniless - they may well struggle to get together two months rent as a deposit and have no financial record here so private renting will be hard to arrange for a while. But it's not to say they will need every meal cooking for them or be driven about everywhere. They got themselves out of Ukraine and to the UK - they may well be pretty resilient and capable!
It's probably worth pointing out that Ukraine is a massive agricultural power house - some of them may wish to be rurally based as their professional expertise is more relevant etc. If they have the savings to get a basic cheap car for cash then there are lots of agricultural jobs that may fit in with the experience of some refugees. (I am not saying they must fruit pick, just that some of them will be highly skilled agricultural workers given Ukraine's economy.
People suggesting Nightingale hospitals could be used - you know in several cases including London and Glasgow, those were in exhibition centres? Which are now open as exhibition centres again? And which are one massive space anyway with zero bathrooms or anything other than commercial kitchens - i think you'd need more than an interior designer to make that into suitable long term accomodation for families.
And much like a previous poster, I've moved in with various strangers. How else do house shares work?
I'm about to have the only bathroom replaced but when that is done in a couple of months, I will offer my spare room.
If it is a disaster, they will have no legal rights to remain in your house. They are akin to lodgers not tenants.