I am kind of having a hard time understanding the post. I apologize for that. I do not understand why your father in law would not want to represent you regardless of whether the home you are seeking is a new home or a resale home. I agree new homes are ALOT less work for the agent. Still it seems strange for me.
You wrote
“So, I went to see one realtor and asked her if she can represent us only for the house I found on the resale market, and she was very upset when I told her so. So, it seems that I have no option to have a realtor. ”
This statement threw me off. Are you saying you found a house you liked and went to a realtor to aske her if she would represent you but only for this single house. Is that correct?
Anyways I am sorry for not understanding. There are good realtors and bad ones. Rustico posts here and he seems good. sdr posts here and he seems good as well. Anyways if you want to post your email address I can email you or sdr has been very nice and posted my contact information in a previous post on this thread so you can call me.