There is no sharing of lawns as each home, has it's own property line.
One could ask their neighbors who does their yardwork. If the neighbors use the same vendor, maybe there is a possibility to get a good rate, if you band together.
Don't think you will save that much but it's worth a try.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).