Social Media Advice Needed for new Client

Dear Fellow Warriors,

I just posted this in the offline forum, and then realized there's a social media forum that I could post this in as well...

I had a fantastic consultation with a fellow who wants social media management services. I know web design, lead gen etc, but I'm not sure what smm services to offer.

The business works like this: when people buy homes, their purchase price determines their real estate taxes. So if you buy for $500k and the state tax is 2%, then your taxes are $10k per year. If your home then goes down in value, you can get it appraised and lower your tax rate. Let's say your home is worth 400 now- you save $2k a year.

This business makes an average of $1k per client and covers an area with 75k potential customers.

So here's the deal: the client wants to encourage people who benefited from his services to post to social media about it, encouraging their friends to buy his services. He also wants to deliver positive content about his business to social media to create good buzz.

So I need to know the following:
1. which websites does he need to be on
2. what does he need to do on those websites
3. how can he get past clients to recommend him using social media

Thank you in advance!