A line of credit won’t commit you to a monthly payment unless you use the money, so you can avoid paying interest when it’s not in use.

No problem with down payment but will need conventional load which is not a problem as I have been pre approved many times just did not find right property.

The down payment wouldn't be minimal if your finances were tight.

Box solely for the purpose of collecting rent but I do suggest having one and if nothing else works use it for rent collections but I would Electronic payments or bank deposits before doing mail.

If I thought for one minute there was a big market for EM deposits and a reliable bevy of potential clients I would be all over funding 7 figures .. but even with all my experience in lending I jsut dont see it  personally and maybe I am blind to it but I close a lot of deals for wholesalers 10 to 20 each and every month for years..

If you use different sources it will be difficult to calibrate the different scores, but think of it as a percentage of the max available score.This particular score seems to be based on an applicant's credit history, including payment history, credit utilization, and credit availability. 

But that also depends on your down payment- putting only around 20-25% down is hard to have a profitable STVR.Ultimately with STR v LTR, I'd be mainly curious about your intended use of the property. 

There are tons of loans out there that use just the projected or actual income from a property vs the payment of the property (DSCR loans). 

We have $400K into the property between Down Payment and Renovation.

Its important to know what the max rents will be so that you can cover your mortgage payment and hopefully also cash flow every month.