After receiving these funds, he and his partner has completely disappeared, leaving us with no communication or updates for over 2.5 years.

Its VERY common for tenant's not to communicate.

Therefore best to communicate with the immediate neighbors early in the process.

What are some key selling points for investors and tenants that you communicate to differentiate your property management business from the competition?

It's a lot easier  logistics wise and the realtor will also probably have better communication with them since it probably wouldn't be their first deal together

If investors attempt to streamline their services, it can lead to a more organized approach to property management, lowers the risk of gaps in insurance coverage or missed tax benefits as well as simplifies communication and reduces confusion.

Ive been using the same for many years now and its my foundation for operations, follow-up, workflow management and communications. 

Balance (compromise) and communication are key in situations like this.

Student housing tips include clear lease terms, property durability, turnover, communication, market trends, and financial stability.Good luck!

And one more question I've worked with 3 REA thus far but so far none of them communicate timely (it usually take 2-3 days to get a response even when I'm letting them know I want to offer on a property) is this common?