If I take $180k (a possible original loan amount) and plug it into a financial calculator for a 30 year fixed and 3.875% rate, it says the P&I payment is $846.If I tell it to pretend the P&I payment is $200 higher, $1046, and ask it to spit out the effective current interest rate, it spits out 5.715%.If I suppose that you've had this house for 3-5 years and don't want to go back to year one of 30, then you can look at a 25 year fixed.

What kind of effect would this have on rental prices for detached homes in the area?

While blunt it was effective and I used it to guide my own investing over the years.

BTW, my pet deposit is always refundable after accounting for any cost to fix damages caused by the pet or owner.  

Here is my questions:The current tenants are smokers, the unit reeks of smoke, and I can't imagine the damage that has been done to the place over their 7 year tenancy.  

What you can expect is high vacancies, high turn over costs, chasing tenants for rent (and never collecting), a lot of damage and vandalism.

It looks like you are seeing the effects of the whole no down payment stuff.

I know how to install the cameras and set up the network so it's cost effective for me.Any thoughts?

I feel your pain, some helpful hints are rinsing with cold water first to close the pores before more fiberglass gets into your skin, then soaking effected area in warm water and epson salt.

Effectively, my offer was 40% of the list price, and i justified it saying the repairs would be at least again the value of my offer.