Hey Duane,
Congrats on the work thus far! 8 in 24 months is no joke, especially chipping away one at a time, I'm sure it has come with plenty of teachable moments, but its awesome that you are able to ask the question of how to scale.
To start, a hard money lender that is only allowing you to do one at a time with your track record is... well... kind of silly. There are plenty of HMLs that would look at your 8 'exits' (whether you kept or sold) and put you on some kind of "Pro" category and help you leverage as much as possible to grow as quickly as possible.
Just keep a good record of your SREO and hang onto the HUDs that you've had from both your purchase and your sales. Once you use those to establish your experience (along with appropriate LLC Operating Agreements to show involvement of owning LLC) then 2025 should send you to the moon!
Northern VA is such a great place to invest right now, a great sweet spot in value add properties + availability. The cost of entry is a bit higher compared to Detroit or Alabama, but the fact that you are grooving is awesome.
I would add to talk with your family to discuss the amount of leverage you are comfortable with as you start talking to these new HMLs. Many will promise high Loan to Costs and low, low down payments, but think about the Interest Rates and what you are comfortable with when it comes to giving up equity in a deal in order to do more deals.
Congratulations again on what you've accomplished so far, good luck in the future and don't forget about us little guys when you've "made it".