I'm almost tempted to do a gesture with my hand and go "Haaaave you met Ted George?" Ali can deal with darker, I can deal with darker, I think we all can deal with darker :)
Old friendship, definitely, and since she still goes by Spinnet (except in formal settings) Spins or Spinner will barely cause a quirked eyebrow from her. Those twins could use all the spoiling they can get, so bring on Uncle Rich (I need to do the family description at some point, but basically Liam is the quieter one, who loves music and is only just becoming almost comfortable with brooms, while Isla's a spitfire, mad about brooms and all things Quidditch HUGE Puddlemere supporter because of Oliver). Any and all donations are welcome so if Rich wants to remain anonymous, he'll remain anonymous (I'm assuming that Ali may know of his donations?). I hadn't thought of Alicia as an investor, but now that you mention it, it would make sense + keep the money flowing (I guess), so sure, let's have her be an investor, or have her accountant handle that for her. She would have been available for all those things during the war, as well as actual Healing if/when there was a need for it.
Melinda remembers her regular customers and usually in which direction their tastes go, so that would make sense. Okay, so I can see that I wrote 'business partnership' and I'm sure I had a reason for it when I did that, but for the life of everything that's good, I can't remember what it was. I'll let you know if it comes back, or if you have any ideas, I'd love to hear it.
Rose travels a lot too, except when she's bored back in London so random encounters in, I don't know, Timbuktu or the Far East (or Romania, she's part Romanian so goes there quite often) could be fun. Otherwise good conversation and sharing of tales is always fun :)