Can anyone recommend a reputable networking group in the Washington, DC metro area?  

They've partnered with BiggerPockets and have built a strong reputation for making self-management seamless, especially for hosts managing a handful of properties like yours.Hospitable is known for its ease of use, automated messaging (a lifesaver for responding to guests!)

Just make sure you understand the outcomes/consequences. 

Moving a house into an LLC has several unintended consequences, as you have noticed.

If you know of a reputable foundation repair company @ $175 - $200 per pier, I would welcome receipt of the company name and contact information.

You can't find much on google, they must have paid someone to manage their reputation.

Have them blown out and truly winterized by a reputable company.

A good approach here might be to present them with a shared cost breakdown and show the direct consequences of disregarding the septic guidelines.

In retrospect, some yellow flags found by the property manager during the tenant screening are now bright red flashing sirens, but the tenant showed decent credit, had a positive previous landlord reference, wrote a charming cover letter in his application, and applied through the referral of a reputable real estate agent.

Not sure of their reputation, any insight or tips for navigating this process at all are apricated.