Just keep using it. I've been using version 9 for almost 10 years now. If it does what you want, why change?
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Land is a finite commodity. If everyone got the same amount, there would only be about 5 acres of land available per person today.
It might not be fair to the teacher to have to pay high taxes on the land, but it's not fair to society to let him keep it for no/low cost when it might be put to better, more productive use for society by someone else.
If he can't afford it, let him sell it to someone who can. If there's no incentive for people to make productive use of capital, the economy stagnates.