I've moved to MXRoute, just started setting it up yesterday. E-mail is the easier part to solve (it'll cost a bit, but MXRoute has unlimited domains/accounts/aliases, compared to others who charge 'by seat'). The larger problem is Docs, Sheets, and Forms. They don't allow you to change the owner to a non-domain Gmail account. So the plan of creating a regular free Gmail account and then moving everything over won't work. They've put the road blocks at the right places to force people who notice this all too late into upgrades.