I will reply to my own post 5 years later since no one else has had advice. I have scaled up to 4 properties and have tried a few methods (including a BRRR from overseas).
1. It's doable! It takes a little extra care, and it really helps to have people on the ground (where you're investing).
2. Having a trusted property manager is HUGE! I would say the most important part.
3. Getting a really good inspection done with pictures helps a lot before closing. I use a company that gives me a detailed 70+ page report with loads of details. This is very helpful for nipping potential problems in the bud, or renegotiating the price.
4. Utilizing other professionals in the area - GCs, Wholesalers, RE Agents, and even investing partners.
5. Having someone you trust to sign as a power of attorney.
6. Be extra organized with your documents, progress checkins, and followup. This may be more for yourself, but it will make it smoother and give you more peace of mind despite the distance.
7. If you can - while you are in the US - think ahead of the documents you might need and ready them. It's much easier there then over seas.
8. Don't over-think it. It really isn't much different than investing out of state. The support structure and involvement will probably look similar.