Am i wrong?

So my sister's boyfriend is selling a small mobile home. He asked me if i wanted it and he would take payments. The landlord interviewed me and said all was great but then the next morning told me i cant live there because i know someone with a dog and no dogs are allowed in the park. I told him their dog has never been at my current apartment because i have a cat. He still wouldn't budge. So i said whatever and moved on.

A month later my sister calls and says good news he says you can have the trailer! I told her i dont trust the landlord and im not giving up my apartment because im afraid the landlord will burn me again. That he will just find reasons to write me up and evict me. The boyfriend already told me how the landlord finds things to nitpick about.

So now my sister and boyfriend are mad at me. Was i wrong not to take their offer?