You're not purposefully causing the sun to expend energy on the home.

if I paid a poor tenant for their poor behavior, it would cause me to lose sleep.  

They tend to start doing "fire sales" which means dropping prices which causes all of the homes they closed on the previous 12 months or more to lose value based on new discounted comparable sales.That is why you see builder always offering crazy "Builder credits" which in most cases are "ghost" funds. 

Landlord and Tenant hereby waive all objections and causes of action arising out of or related to any change of address made by means other than certified mail. 2.

Cause that's not going to work in my favor.

You probably recoup the 5k in ARV, but Old North Milwaukee is an economically challenge neighborhood, so manage your expectations.Avoiding frequent turnover, tenants who don't pay, damage property or cause other issues is the name of the game to achive long term profitability.

The only thing causing a little apprehension as it’s new to me (I am from UK so this is my first US purchase) is that the sellers, a local investor group, has said they don’t want me to do an inspection and have already got a pre inspection from a few months ago, and have rectified any work.

Most glaring issues to me are:- DWV pipe leak- Some outlets aren't grounded in both unitsWhat are things you've seen in the past that were real causes for concern/concessions in closing the deal?

The 2 main issues are that there's a leak in one of the bathrooms that is causing water to flow under the sub-floor and into the crawlspace. 

I put that project on the back burner since higher development costs and thin margins were already causing us concern.