Should I build small, 2nd home on my property?

[Karsten Madsen]

To help our son break into the housing market, we are looking into building a small (approx 1,000 sq ft) home on our 6.4 acre lot in rural Ontario.  My curiosity is how it would effect influence of this on selling at some point in future.  The 2-house property could be marketed as having a stand-alone Granny Flat or Air bnb unit ... but that would mean a smaller pool of potential buyers.  Any thoughts about this?

Ciao,
K