For example, California has an $800 minimum franchise tax, while other states have lower fees or no franchise tax at all.

Whats making you think rates wont go down after a couple years given the new administration in charge?

As a PMC, we allow tenants to:1) Mail in rent (we charge a Processing Fee)2) Deposit at our bank (we charge a Processing Fee, but less than the mailing one)3) Use Zelle, Venmo, etc. 

If you hire a PM, they typically charge 15~25% of the gross.

When I pointed that out, they suggested I instead setup my credit card as a vendor, and enter each charge as a bill, which would then fix the assets and liabilities issue.  

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

.$300k mortgage at 7.25% (30-year): $2,046$300k mortgage at 7.6% (40-year): $1,996Technically, it lowers the monthly, but not by much once factoring in the rate adjustment.

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.

Walkthroughs are never detailed enough to be final (ie often tenants have lower disconnected and discover broken appliances later.) 

But as far monthly payment you could easily buy a house in a cheaper location have less roommates and the same monthly payment or the same number of roommates and a lower monthly payment.