can you derscribe more details, is your primary residence , you're trying to get the house in Malta or elsewhere, are you trying to get a loan if it's a shop, your budget, etc...
it depends where she's at right now. either if she already in EU (like program which was in Portugal, manifistacao, when you can apply for residence permit from INSIDE the country being on a tourist VISA), finishing with the golden visa's in Portugal / Greece, Spanish (already winding down)...
it's possible for any European program so far, they are not restricting russian passports to apply for the investment / permanent residences programs like any other nationality...