Almost all also offer the tenant an opportunity to pay by debit or credit card, plus a fee.As a PM, I believe most target self-managers and I not aware of any that have a 'landlord-portal' to share updates to your clients. 

If the tenant chooses to pay with a credit card or debit card, as opposed to directly from their checking account, they're charged a 3% fee. 

There's another category called "prepaids" you'll want to get familiar with as well, which are the taxes and hazard insurance premiums a lender requires to be paid in advance so as to ensure their collateral (your home) isn't go to be a loss if you don't pay the taxes and the Govt comes and takes it away or it burns down in a fire. 

And once the prepaid rent is gone, do not expect another rent payment.

I've considered redneck bank, but I won't get their awesome 3% interest on the checking account unless I do 10 debit card transactions a month (and no way will I do that).

I'd expect closing costs to be about the same. 5kish for fees and prepaids.

I was lucky enough to have gotten through college without any debt thanks to my parents prepaid tuition.

After 9 months of paying £31 direct debit, I had a £400 electric bill with the premise that I wasn't paying enough.

And in answer to your question, things to know are if for any given rate the buyer is paying points, is there a pre-payment penalty (this is unlikely but worth noting), get a good estimate of the total of closing costs and prepaids.

My way of thinking of it was I have an asset where the credits make more than the debits.