They are advertising quite a bit on social media.

I certainly want to plug into an investor circle, hence joining bigger pockets.

@Forest WuRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

You said they are "from California" but now you are saying they don't have a social security number?

The best option would be to regularly attend real estate meet ups and get into the right circles.

I always say to go follow different people that offer STR masterminds/courses on social media, and whichever one clicks for you and has similar goals consider joining the group.

If you want to be a couple hours' drive, then keep your circle within that.

I’ve flipped in the dc area for years, right now there is just money & in the vast majority of cases there is high likelihood of losing money, right now the best investments in the area imo are buy & hold, I’ve even gone full circle and while I really liked value add for most of the last decade I think in a lot of ways new construction especially in more affordable markets (I’m personally a big fan of the eastern shore market) is a much better way to make money long term than flipping and brrring while I know they are sexy & certainly you getting a huge paycheck is great, there just isn’t any money in it right now, especially in nova. 

We currently own two (2) STR/MTRs, one (1) LTR, as well as a primary residence in the North Charleston Area (Park Circle). 

Competition creates a healthy financial environment and the US will do what it does well circle back around and create a back door and establish new vendors to buy/sell.