Without questioning the procedure, process, or the motives of the OP, I will say that a little courtesy goes a long way. I have never walked away from an assignment under any conditions except one time. I was asked to appraise a 3 unit property. When I got there I found out the units were located on the second floor of a church. I have had to come back a few times when plans and specs were not provided as promised. But, given the exact situation the OP encountered I might have offered to come back at a more convienent time. I am sure we have all dealt with new babies in the house, handicapped folks, and a myriad of other situations.
I have found after many years of practice that inspecting the interior first works best for me. It may not work best for others.
I have dealt with many customs....taking shoes off inside, being offered tea, coffee, a cold drink, vegtables, eggs, and still find that you can say no if you do it in a friendly way. However, I have also had more than one occassion to treat a few hard *** obnoxious people like they were trying to treat me. Key is to do it with a smile but let them know you can be as hard *** as they are. Respect is earned, it is not automatic.