You have to just commit to doing the lead generation 5-6 days a week (social posts, door knocking, talk to people you know, talk to people you don't know, host open houses for agents in your office, drive for FSBO's, etc) until you have planted so many "seeds" that they result in business. 

REI Central, CHS Circle, and the Tri-County Investor's Association are a few of them.

Will this affect her survivors benefits social security income? 

Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

If you need any STR designer recommendations or social accounts for inspiration, feel free to reach out!

Also, are there any social media websites with groups that I could network with that highlight investors & wholesalers? 

The reason people pay for these courses is to deliberately choose their social circle, and a person's social circle is the most likely factor to dictate their level of success. 

These syndication educators teach you underwriting, give you lists of brokers, recommend you increase your social media visibility and are provided techniques and tools to raise capital.

You are watching too much content on social media.

Social media is a double edged sword, that I don't think a lot of syndicators fully understood when tapping into it.