While we mainly do asphalt shingles, metal is the 2nd most common roof we install. 

  $200/month water/sewer/garbage, $50/month common electricity. 

Is it common to re-negotiate after a rate-lock? 

If you are just looking at the properties listed on the MLS (Zillow, Trulia, Realtor.com) it is very common for the numbers not to pencil out in the Peoria area.  

They commonly have investment minimums and only accept accredited investors.

“Make no mistake, this bill doesn’t do anything to change the power of local governments when it comes to dealing with good-neighbor policies that affect the neighborhood.Fischer said the measure was based on “common-sense” feedback from numerous “stakeholders.”The House plan is now headed to the floor for a vote.

In truth, we knew there were red flags with her rental history but we forged ahead thinking we had some additional protection because we share common areas with her. 

And if you're not wanting to be a land lord any more then a move to something like a DST (Delaware statutory trust) or Tenant In Common (TIC) give you an alternative that provides well within the same returns as your index fund these days while still maintaining the tax deferral of the 1031.

Typically, according to the lease, you are able to charge back expenses to the tenant, based on their pro-rata share of the property, in what is called TICAM (Taxes, Insurance, Common Area Maintenance).

I know less then zero about real estate (and real estate investing) in London unfortunately, but I will say that your planned rent vs property price would fail a common test in the US called the 1% rule.