LLC registered agent

Another LLC question on registered agents. Sorry if these are minute details (they feel big to me, but perhaps they're not).

Scenario: I set up an LLC in one state (in this case, DC) and then qualify it as a foreign entity in another state (VA). I have a friend who will serve as the registered agent (or I could use a service to be the RA and pay $129 per year). Then I set up another LLC to buy a property in VA. For that new LLC, I believe I can use my foreign LLC as the registered agent, but what address would I put since the business address is in DC, and the RA address must be in VA?

Hopefully that makes sense.

Thanks!