Settling in the UK

Hi All,
I am a 63 year old British born UK national and my wife who was originally from Russia but has had British nationality for 9 years. We both work full time and own our 3 bedroom house in Hampshire.
My wife’s nephew ( her brothers son ) his wife and their 7 year old daughter would like to come to the UK and eventually settle here. They have all visited us in the UK several times and have returned to Russia without hitch at the end of their stay.
They have college qualifications, his is economics and hers is Land registry, but they are not the equivalent of a UK university degree.
They are both receiving intensive English language and English life lessons in Russia.
How can they come to the UK to work or study and eventually settle here?
Can we sponsor them in any way with either financial support or accommodation or both?
Any comments, advice or further reading tips would be very much appreciated
Thanks

They can via normal routes - i.e. not by you and your wife status - i.e. student like you say, very expensive though, budget £30k, plenty on here would recommend cheaper options but read the forum and you'll see many of these options fade away and end up leaving the poor student penniless and visa less...

For work needs shortage skill - not for those without a long work record...

Udachi...