I am not a marriage councilor, a quick cash business, bank, humane society etc etc.I say all this to make the point------- Have a lease    Stick to it       Be firm     Don't make concessions     It's an agreement/contract       Hold them accountable     They are an adult      Don't accept a reduced rent because you feel bad for them - this is a business not a charity.Because you accepted some sort of payment of rent you may not be able to count this month as violating the lease on the rent amount - you will have to check state and local laws.On the pet provision that was broken, you should be able to give them a 30 day vacate notice for violating the lease agreement.

When we spend massive amounts of public (or printed) money on huge infrastructure projects of marginal value and financing huge corporations at obscenely low rates while charging small businesses a huge risk premium, society at large suffers. 

There are many people who are to blame.I completely agree with the interest rate/cash flow analysis (which means that if a person gets a 5% fixed 30 year direct am now, they can watch their property values fall in half, but if the rates go to 10%, the cash flows the same.)This is an example of the decline of personal accountability in our society.

Housing is a major problem for people who just don't know how to function in this modern world.

The property is a mid-century modern and judging by the color choices and the neighbors, the old owner was a bit eclectic.

Park is not big enough for modern homes its all little single wides...

We eventually settled on a darker floor as we thought it looked more modern and we felt that it would balance with the white counters, and we plan to do a white backsplash eventually too. 

Am I too goody two shoes for the modern real estate world?

My interest in design include sustainability, affordability and modernism.

You can also "pack em in" which can often be seen as an advantage for you, not so much for them.I think I've made it pretty clear that tenants are not always the bottom feeders of society, many are great folks and just choose to live cheaper. :)