How do i respond to this and is this even the sort of thing that i can prevent in the future?

In this case, the weather stripping not only prevents damage to the home, it prevents the waste of utilities and it will keep the tenant happy. 

I also did not rehab the property enough to prevent some of the headaches down the road with maintenance calls. 

I have decided to go forth with letting the tenant know that this is a violation but will work with her on preventing situations like these to arise in the future.

They came into effect 6 or 7 years ago and basically state any contractor that is disturbing any painted surfaces of a home built before 1978 must either prove the paint is lead free (by having the paint tested) or must take preventative measures for mitigating the spread of lead based paint dust.

Read the entire message and inform everyone you know to prevent others from experiencing such financial loss.On 3/26/19 Sean Richway (who was fined in March of 2019 for violating real estate related laws in Essex County [https://newyork.cbslocal.com/2019/03/27/forgotten-families-landlord-2/]) entered into a joint venture agreement to share in profits upon the sale of an asset located in Roselle, NJ.

Even if she is at market levels, nothing would prevent requesting a modest rent increase, say 5%, that put you above market levels.

@Michael KingI could have $1500 in a checking account that yes, prevents me from being charged $12 a month as a service feeORI could have $1500 in a online savings account with Discover or Amex that gives me a 1-2% interest rate on my money, even if its just a few bucks.I agree $1500 is not a lot of money, however it is just sitting in a checking account not doing anything (ie, not invested making me a few bucks), it's just a placeholder for the account to hold the fee.

(it prevents the issue if one part of the contract is ruled not enforced, then the rest of the contract will not be nullable) - what is that called? 

This also prevents any type of co-mingling.