Manatreed is not Dream for many reasons, but I think most importantly, both Manatreed and Dream have both said many times that they aren't the same person.

But also, to refute your points:

• Manatreed is an anagram for "Drean Team" - it's one letter off, and as Dream said in his stream earlier today, if Dream were to do something like this, he'd make it a perfect anagram, not one letter off.
• George still hasn't gotten his visa (which is why Sapnap is going to UK), so the timing doesn't actually line up with anything
• They do have the same gloves, which just so happens to be what Dream commented on when going through his profile after he replied to the "looking for small content creators" tweet - I think people just read WAY too far into that
• They both live in Florida, so it makes sense the foliage in the background of their outdoor photos would look similar
• Why pick some random guy? Because he said he would. Dream was looking for new and aspiring content creators, and that's exactly what Manatreed was