Am I being too stringent? 

You can also wait 90 days to use the new appraised value on a DSCR loan without stringent requirements.

Highest credit score, highest income, all measurable objective facts?

Your goals should follow the SMART criteria: specific, measurable, attainable, relevant, and time-bound.

No Architects in the area have experience with that as it's not common and the local codes I heard can be more stringent than Energy Star.So then do they have to physically meet or can I just send the architectural drawings to the Rater to make changes or add materials?

This last weekend it measured 4 1/2 in on the rain gauge and the water made its way into the kitchen. 

Non-Warrantable Condos: Non-warrantable condos don't meet the stringent requirements set by GSE Agencies.

If they insist on moving forward, let them know that there will be penalties for signing the lease and then canceling later.The time to do radon tests or look for mice or measure the bedrooms was during the inspection period.

Regarding financing (and sight distance approval), maybe having your architect make up a small model with people and cars to help sell the project to the bank.This could be costly and of course there's no way to measure the effectiveness on their decision. 

It helps me very much in measuring our next steps.