Review lease for 'disturbing other tenants' clause and the seniority of the two combatants  - - longest tenured tenant wins - - *IF* you do have to intervene.

More likely that your tenants are disturbing everyone near them and just not caring about it.    

Or live in a tent.So the growth in rental income is at the expense of money lent by the banks for home purchases.And our own tenants reflect that to some extent as well.The second link I find rather disturbing, that 41% if sales in my state are going to investors.

@Josh Caldwell this particular listing states No Inspections, can't enter property, don't disturb occupants, purchasing sight unseen etc etc..What's your thoughts on how to approach this?

that is a killer deal I would not disturb that current note you have.You can always get a 2nd position note or line of credit (HELOC) through a location credit union that can usually go from 80-100% LTV but as a prior responder mentioned, it may be over 5% but only for this this loan while the first loan stays in first position at 3% (sweet deal).Have you considered getting a HELOC or loan in second position?

Gardening or saw obvious disturbed earth and decided to investigate?

Don't want to disturb the tenant yet. 

Was very disturbing at first with the home being so new !

I don't especially want to disturb the tenants with inspections or appraisals of that lender or a conventional bank doing a cash-out mortgage.

The CMA he provided was really disturbing though...