Ask your Buyer's Agent these questions. However, it appears that you do not have a Buyer's Agent representing you, and that you are trying to buy this home unrepresented by going directly through the seller's agent. So, you need to ask the seller's agent these questions or your real estate attorney, because nobody here will be able to advise you.
A word of caution: DO NOT BUY ANY TYPE OF PROPERTY WITHOUT YOUR OWN INDEPENDENT REPRESENTATION.
You have lots of questions and concerns and because it appears that you do not have your own independent representation, you have nobody reliable to go to for advice. Sure, you could go to the seller's agent for advice, but s/he works for the seller ... not you. Anyways, you may be best advised now to get a real estate attorney involved to assist you, and next time .... DO NOT BUY ANY TYPE OF PROPERTY WITHOUT YOUR OWN INDEPENDENT REPRESENTATION.
Buyer's Agent Realtor