What a shame!
If you can't deal with her terrible spot but love her a lot then maybe doing the 16-villager cycle for her would be worthwhile like the poster above suggested.
Plot resetting only works if you have 3 or less human characters in your town.
On the day when you know for sure that you will get a new plot, instead of loading onto one of your human characters, you want to create a new save file. (Campsite villagers will move in 2 days after they agree, adoptions from another town will move in the next day but very rarely in 2 days)
Once you've created your new save file run around town to look for the new plot
If you like the placement, then talk to Isabelle at the town hall, set up your house with Nook, talk to Isabelle again then save and quit. Load onto that character again and demolish their home. The new plot will now be saved!
If you don't like the placement, just close the Animal Crossing app without saving and repeat the process.
You may notice 'patterns' when you plot reset (i.e. the plot keeps appearing in the same general area only moving a few spaces each reset), you can break this pattern by completely powering off your DS and turning it back on
^This personally works for me, but note that a lot of other people claim that this does not work for them
Good luck!
