If they are unable or unwilling to provide the information, I would consider that a red flag. 

If they are unwilling to budge at all, then a warranty is just another tool in your belt to try to eek out a little more. 

We’ve also done more loans with him.I’m always amazed at how some lenders are unwilling to cut anyone some slack but very willing to cut their nose off to spite their face.

I would allow their lease to expire and replace them with new tenants if they are unwilling to pay the increased amount, which at an extra $300/month I highly doubt they would. 

The fact that you are unwilling to buy properties due to what you call insane prices and them having doubled in value is insane.

However- they are unwilling to move forward because the town that we invest in does not meet their minimum population density thresholds. 

I think if he still is unwilling to maintain the grass and leaves then I will try to let him know that he’s in violation of the contract and offer to write up a new contract without lawn maintenance involved with a higher rent.

Let me go back a second, there was a $50 unpaid water bill that my investors were unwilling to pay so in order to save my deal, I reimbursed them myself.

If they are unwilling to do that then talk to your tenants about you replacing the filters monthly at the property.

Seller unwilling to pay for survey acc to seller realtor.