I don't know if the situation with the "nasty" tenant is salvageable or if there is any legitimate basis for their treatment of you and your staff. 

Although I'll lose revenue from the amendment, it is a great law to enable home owners to remove unlawful detainees.

There are some plenty of people that are legitimately trying to stay sober and benefit from the camaraderie of living with others in a similar spot.

He's blown up at me in email, and in the background when his girlfriend (my legitimate tenant) was leaving me a phone message.

The tenants had a high level of trust in her, & there weren't many incidents pertaining to tenants not disclosing legitimate issues.

But, generally, this is not very accurate.Anyway, there are a few more techniques they can use, but this gives you an idea of how they should go about it.So, as to your specific question, YES, you can most definitely dispute the appraisal if you think there are legitimate reasons to.

If you have the cash, proof of funds is easy: Screenshot a bank balance or provide a recent bank statement.If you have a legitimate hard money lender who has underwritten the deal and confirmed you have the down payment and cash to close, they should be able to provide you a letter stating exactly that.If you have neither, then you have no business making an offer in bad faith and trying to tie up the seller's property.Also (and this is crucial and a common rookie mistake) - Don't send a "cash" offer to the title company and then neglect to tell them about your hard money lender.

You waste their time when they could've found a legitimate buyer.

If you purchase properties in a good investment city, rent growth will exceed inflation, enabling you to maintain your current living standard throughout your lifetime.

I'd be very surprised if you have full replacement coverage if all of the factors you listed were in play when you purchased the home/policy.Filing a legitimate claim won't make you uninsurable.