Electrician just emailed me that we could go to 2 phase, one for each house.  But I would need another meter and also new cabling probably from the pole to the house.



From you have said previously,  I would grab this with both hands, get a ball park quote and look at getting the ball rolling 


- its likely to be well under the 45K you were quoted for solar and will give the second dwelling more than enough capacity ...