Thanks again to everyone for their patience in giving me the time to finish the challenge. More details on the last several years of the game and screenshots can be found in the town blog thread at:http://worldofbanished.com/index.php?topic=809.msg14762#msg14762
Here's the summary of the town as of early spring year 50:
Map: medium valley map with a mild climate, disaster on, hard start
Total population: 725 (503 adults, 93 students, 129 children)
45 boarding houses containing 285 families
99% educated (a leftover effect from nomads and a mistake in destroying BH's -- got a school without meaning to)
Health: 5 hearts
Happiness: 5 stars
Other buildings: 21 gatherer huts, 15 fishing docks, 10 hunter cabins, 7 woodcutters, 16 forester lodges, 5 herbalists, 2 blacksmiths, 4 taverns (berries), 4 tailors, 11 markets, 4 hospitals, 5 chapels, 10 active schools (plus 6 more for shuffling students), 1 trading post (finally had to build one in year 42 for food and stone).
This was a really enjoyable game. Thanks to @kee
for coming up with this challenge, and to @irrelevant
and others for their advice and insights throughout.