The house is already occupied by a tenant and is on lease until April next year. 

Nothing in your revised offer would be new information that causes them to reevaluate the pricing.The rent amounts should be in the leases, so there shouldn't be any question about GPR once you're under contract. 

I self managed and self leased.  

I have seen sellers try to sell homes with 10 year leases at below market rent. 

I was going to say make sure you get them the tenant statements and leases prior to closing

I purchased that duplex for $116,000 and had the gross rents at $2,105.00 after re-leasing 1 of the apartments after the sale (roughly 1.8% of sale price, so just shy of the 2% Rule).  

I'm guessing because it is probably more of a sure thing with higher occupancy and more cleaners/handyman companies etc? 

I know there are a ton of features I don't utilize personally, I mostly use it just for tenant application and screening process, and then for rent and fee collection In my personal experience here's my pros and consPros•Had a template for screening questions on the application so I didn't have to think of things to ask myself•Handles rent collection easily and for only a $1 fee to my tenants for ACH transfer which makes it easy for both parties•I can set up all rent and fees at the beginning of a lease term so it's set it and forget it for me•My tenants have said setting up auto-pay was easy and I like to make it as easy as possible for them to pay me!

But once you get tenants and leases in place, lenders will really dig in to the details. 

If we rent quickly, we may increase rent for the next lease!