Often times we have the vendor/contractor reach out to the resident to communicate directly on a time when they will be home to let them in.

The full circle of this would be paying vendors, employees, taxes, accepting payment all in crypto/facebook/bitcoin/form perhaps and without an actual bank involved. 

There are some really great podcasts that talk about different things, and there are actually quite a few vendors that produce content (podcasts, blogs, webinars, etc) that can educate you a ton.

A good vendor will often provide insights and a documented professional opinion, which can serve as third-party confirmation.

Perform the same task in each app to ensure a fair comparison.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.Run a credit/screening report on yourself.Enter a maintenance request, assign a vendor, and attach a fake invoice.Enter charges to the tenant's ledger.Enter recurring charges and automatic late fees.Sign documents electronically.Run owner reports.After testing a few apps, one should clearly stand out.

I have connections with great vendors throughout the city and actively search for deals and present them to investors. 

Highly recommend checking out https://www.cincinnatireia.com/HUGE group of local investors and vendors that network about something almost every day, virtually and in person.

I was talking to a cost segregation specialization vendor that does this nationwide.

Except not nearly as high as claimed by this cost segregation vendor.

If someone else has use that vendor, that certainly helps with who we should use.