Passing by Laingsburg,MI and Cooper City,FLA

Any guys and gals in the Lansing area,i have tried to google the farm i used to work on as an intern on a visa waver exchange programme,or a J1 visa,but cant trace Kevin and Sheila Kurtz of 4239,Seib Road,Laingsburg,he had a brother called John Kurtz,it was a large dairy farm.
And no trace of a tree plantation/nursery in Cooper City called National Nurseries,with long distance truckers loading trees for shopping malls to go all over the States/Canada.They gave us three Uk lads a free bungalow to stay in.Any pointers to find these long lost work mates and bossses.