That would be my suggestion. Because I have a 79x79 plot and there aren't any 20x20 plots for me to buy to get up to an allowable 100 max.
Say, if you have a plot larger or equal to 60x60 then you can only have 1 plot. If you have smaller plots, then you can own multiple plots, up to 100x100 total area. And it is metres, not feet. Only primitive savages use feet!