In September of 2019 i accepted a promotion with the federal govt and moved to Washington, DC.

Congrats on your Washington DC condo - that's just the beginning!

Investors should therefore exercise significant care when choosing their Qualified Intermediary because of the critical role the company will play in the administration of their 1031 Exchange transaction.It is extremely important to note that 1031 Exchange Qualified Intermediaries are generally not required to be licensed, regulated, audited or otherwise monitored by any regulatory body.

I am looking for advice on how to proceed with this and what my legal rights are as a tenant in the state of Washington.

I am not sure of the STR rules for that, but I know SLC has not rounded the Western states curve yet and caught up to Oregon, Cali, and Washington. 

I hope you are asking two separate unrelated questions, because there's no point in doing cost segregation for properties held inside your self-directed solo 401k, save for some very rare exceptions.Some of the Bigger Pockets experts who operate reputable costs segregation companies are @Bernard Reisz, @Yonah Weiss and @Julio GonzalezSome of the Bigger Pockets experts who offer Solo 401k administrator services are @Dmitriy Fomichenko, again @Bernard Reisz and @Brian EastmanReach out to them and see if they can help.

I have a fairly clear understanding of how to manage the administrative side of setting up an LLC or handling legal aspects from outside the United States.

If you're not careful, the administrative requirements can trip you up—but when done right, the savings can be well worth the effort.For those of us scaling our portfolios or actively managing real estate deals, the conversation about structure isn’t just theoretical—it directly impacts how we protect our wealth and position ourselves for long-term growth.What I’ve found is that many investors don’t realize how critical their personal credit is in setting up these entities successfully and accessing the funding they need to operate and grow.

Loan administration is also a consideration although less important in this scenario. 

The listing for my property is here: https://www.zillow.com/homedetails/682-Washington-Blvd-Baltimore-MD-21230/36535551_zpid/I currently have the house listed for $2,800 after decreasing the rent multiple times over the course of 5 months.