Dream acreage here I come! You might have to squint

I just calculated that I now have approximately 1.48 hundredths of an acre!

1 acre = 43,560 sq ft
1/3 plot: 15.75ft x 10.3 ft = 162.225 sq ft = 0.00372, 0.372% or 3.7 thousandths of an acre
new plot: 15.75ft x 30.9ft = 486.675 sq ft = 0.0111, 1.11% or 1.11 hundredths of an acre
Grand Total: 1.48% of an acre

I've always believed in rampant baseless extrapolation so here we go:

I started out with a plot last year in another garden (on the other side of the city), that was about 100 sq ft (I gave up that first plot for my current 1/3: 100->160sqft). This gives me 3 data points, or garden acquisitions, total. Plotting my total square footage at each of these changes (y axis), by how many months had elapsed since I began community gardening, gives the line to the right.

Extrapolating linearly, at this rate it will only take me 76 years to acquire an entire acre. Wow. I have some good longevity genes on my side, but that's still pushing it. Not to mention that the community gardens only allow you 2 plots total (which is why this is baseless extrapolation - merely an excuse to graph something).

Clearly I need another plan.....