Welp, I tried out the expensive 3/4 horse that I thought would be marginal, and I was right. Then went and got the 1 HP blue bomb and it will work to get to the top of the hill, but still going to have to put in a 1/2 HP version of the blue one at the top to boost enough pressure for the house. Both together will be cheaper than the $500 automagical that was recommended to her. I'm calling it a win. Will deal with a housing, the 2nd pump, and fine tuning when I get back from Colombia next week 💦
Oh, and then to tie in a 250 cistern on the roof with the small pump for backup.