You can try to go after their renters insurance, but since you don't have proof, you're probably not going to get anywhere.

So all of the people I ever had paid one bill on the first of the month like a normal renter did, but technically they were on a week to week schedule for eviction purposes. 

In my almost 20 years of doing Subject 2's and working with other investors in almost every State in the US, in the very few instances the Due on Sale is called it is because if the inexperience of the Investor in not knowing how the transaction is to be done, (not closing with a Title Company or Attorney, not doing the Insurance correctly)Most of all, (not communicating with the seller) Bank calls the Seller to offer them Life Insurance or some other service, and the seller tells them, "I don't own that house any longer, some guy took that house from me and put some renter in it"If you dig into any investor that tells you they had a property or a friend of their brother in laws Collage roommate that had the Due on Sale clause called, you will most likely find that the investor screwed up somewhere.This is why Education and knowledge is needed on any Real Estate transaction.I get calls almost everyday from someone who screwed up on a Subject 2 and is asking to be bailed out, many times they do not want to pay for help, and things just get worse.If you know how to make the Bank Comfortable with the transaction, all is good.Last year I had a couple of hedge fund managers call me asking how they can offer their under preforming loans to Investors to by Subject 2, wow what a great deal, I could call Pace and he would have buyers the same day for a 1,000 homes, but the legal aspect of this would hold the Hedge fund liable so we could not do a deal.

In addition, we can do a DSCR loan on a purchase of an investment property even if the borrower is a renter. 

I just don't see what the difference is between an owner occupant dying from a fire in their home and renter dying in a fire from a rental cabin that sleeps 12 or more.

When in fact their investments were already down the tubes and they simply did nothing to really check if there was income coming in from renters. 

Although when you do have a good renter it tends to be really good but when you get a bad one in there it's really bad.

My go to for lowest hassles, taxes and  transaction costs are Lease Options or selling directly to the renters. 

The renters generally stay put and there isn't alot of turnover. 

I had similar concerns as a noob 16 years ago, what if I can't find a renter.