Is this considered acceptable or would most want monthly payments in the interim?

I also offered 75k over what was asked, won in that sense, and now I realize nothing is gained from “winning” by having the offer accepted if it is a bad deal.

What are some good strategies to get accurate utility costs, vacancy rates, and insurance estimates so that you can calculate NOI and cash flow to take to the bank for loan approval?

This means that you are opening the door to an easy court case whereby ALL of the lease payments are credited towards the purchase.3)  The Option Consideration will not be used as part of the down payment by the bank because the Option Consideration Payment has nothing directly to do with buying the property. 

I accepted it the first time but then rejected it after that and plainly told him it wasn't professional to accept gifts from tenants when I'm working for the Landlord because it could create a conflict of interest.

that's our way of giving back.. directly. so in short  the govmit  be it city county state federal / and big banks and Bond companies have to lead the charge for affordable housing.So take what I face as a small home builder building 30 or so homes annually for fair market prices.its rare that we have a parcel that all in buying the land putting in all the UTLS  paying for all the permits etc we are less than about 125k before we put one foot on the lot to go vertical.. so in our markets affordable housing is right at 350k and up to 400k. 

@Raymond Y.Many times, once your bank is comfortable with your experience and deals they won’t check credit every time.

We’re looking at a single family bank owned property- cash or rehab loan only.

Should I move on to another bank?

I've begun looking into foreclosures as a possible avenue for BRRRR deals in my area but I know that the listed prices of foreclosures doesn't always reflect what the bank is willing to accept for a property.