As a landlord, you should be in the business of offering decent housing for a fair price, but if you're unable or unwilling to meet tenant expectations, and you  both cannot reach a compromise, the simple answer is for the tenants to find another house more suitable for them.  

If you are unwilling to do this, why expect the landlord to provide this level of generosity. 

If the seller were unwilling / unable to do that, we would buy the property as is and deal with the tenants up on takeover.most of us would recommend removing the tenants and placing new tenants at the higher rate rather than try to increase rent on the existing tenants. 

If the loan is to a non owner occupant, it is considered a commercial loan and not subject to to the same regulations which are intended for consumers.Hard money and private lenders are unwilling to lend to owners occupants because of the huge potential liability.

But if they have long term, below market leases they may be unwilling to leave.Try to get "estopple letters" from the existing tenants.

You cannot bring your own lender to the table, and they were unwilling to share the list of approved lenders, so I could see if there was overlap with my lender. 

I would be happy to indulge the BP community by discussing the process on the forum, or if anyone is willing to correspond privately or via phone, I would accomodate anyone willing to be a sounding board.Extremely briefly, all the sellers have been unwilling to "meet my demands" under attorney approval or continue to negotiate post structural inspection (with major items flagged by inspector).  

I put a property under contract yesterday where the seller was unwilling to come down in price beyond 1%.

Of course the problem with this is You are unwilling to do this since you never share any details about anything, you don't even list what city you are from on your profile!

The main reason is that buyers know there is a cost to repairing the foundation but they are unwilling to pay you back for the full amount.