For example, we've recently taken over marketing internally because the property management company was not experienced enough in using the newer advertising methods we need to pursue.

Hey Themis - I used a similar strategy in my first year investing in Cleveland, focusing on the BRRRR method with SFRs, and it worked well.

I take a methodical and pragmatic work approach. 

We are working on our first flip house and we didn't plan to do the BRRRR method, although it has come up in conversation multiple times due to the area it is in, we are still tossing the idea around of keeping it as a rental.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

It's far superior to something that they must do each month.

@Treza Edwards "I am reading the Rental Property Investing book and implementing the method that focuses on cash flow and that strategy states you need to have $300 cash flow per month, per property.

Many opt for other investing methods in their SDIRA like private lending, crypto, private equity...anything except collectibles and life insurance.Note that a Solo 401k is exempt from UBIT on leveraged real estate so if you have self employment activity and no full time employees save for you and your spouse you should consider the Solo K as an option. 

And while nothing is foolproof the most consistent method of finding good vendors is relying on OTHER real estate investors that have worked with those vendors. 

I'd send out 500 at a time, using a different mailer/method weekly.