It means that if you sell any object (say cars), then don't dilute your time, money and effort to diversify into non-car objects (eg flowers & candy). 

I've worked with literally hundreds of contractors, many of whom I've had VERY good relationships (I have contractors who have been working with us for nearly 10 years and we go to each other's kid's birthday parties). 

We currently rent the church out but have other plans for other ventures thru said building including a coffee shop, using as a wedding venue, reunions , birthday parties etc.

Trim hedges, mow lawns, plant flowers and haul away any junk from the yard.

You can also run advance campaigns for special events: birthdays, anniversaries, Valentine s day.Most important, use You Tube videos to market your property directly to  vacationers.

When we decided to invest in the hi-desert, we were living in LA at the time, so we knew we could take our own personal vacations there when a house wasn't rented, and we could use it to celebrate our birthdays and holidays, and one day we could potentially retire there.

Send them a small gift card for their birthday and Christmas to show your appreciation.

Maybe put in a flower bed or bushes or some kind of a lattice-type barrier that looks nice.  

At least a family of four will vacuum the carpet and plant some flowers in front and generally try to make it look like a home.

(Happy Birthday, by the way!)