Maybe that's his objective (or he's just miserable).  

If you don't want a part time job, you'll be miserable.  

They don't have to prove it to make your life miserable - the claim alone pretty much makes for a bad time.Consider that maybe you're getting a lot of interest because you priced it well and marketed it effectively. 

C maybe  D forget it for your first rental unless your totally hands on.one side of the coin is your bright outlook.the other is you have a miserable experience and never want to buy rentals again  my vote is to buy quality thats where the money is made in this game not buying because itgs cheap.

I wonder if the resident's experiences have just tarnished their attitudes irrecoverably and I'll end up being miserable and constantly stressed.

Although the pay, benefits and pensions are all amazing, I do not want to be in the field until I'm 65 and miserable.

I highly suggest to engage in your nice of passion because that passion will bleed through how happy, confident and enjoyable you are at it, and people like pleasant people, not miserable ones.

If the law says you have to provide a buyer or a tenant with the disclosure, I don't think you can contract around that with a clause that just says I don't know anything about the house, I can't disclose anything, buyer to do their own due diligence.Of course it all works until it doesn't and then you make your own life miserable.

I tried to buy from one, but failed miserably. 

I may be totally wrong, but I know I would be the most miserable person on earth if I had to ask my wife for her opinion regarding whether or not to do a business deal with the exception of being married to a woman who has more real estate experience than I have and then I would be afraid to marry someone who called me 'stupid' every time I make a mistake.