Was it via docusign or some other online signing platform? 

If you're more of a 'personal referral' person than a 'do research online' person, and this is local to you in Manhattan, KS, hit up one or two of the trades people in the "little apple all stars" BNI group.

You can also check their reviews online at Google, Facebook, or Yelp.

The online gurus are the worst.

Behind referral on on-line sources like Next door, Google review, FB marketplace, etc.  

Unfortunately, while all the online places area great sources of information, you are much less likely to take action, or find someone to shadow, when online in a forum. 

The "online leads" trend becomes a vast pool of scams, each one discovering a new and "better" way to find motivated sellers via SEO/Paid adds/Social Media etc, and automatically aims to make a profit from selling those so-called leads.

Focus on identifying promising neighborhoods in the north or east bay by leveraging your husband’s contractor network, local real estate agents, and online deal-finding platforms.

No.But you do see their website online, right?

I couldn't find much information about them online besides their own blog posts and a few interviews with the founders, who were promoting MHP business and themselves.