Ultimately, the proper way to resolve the issue is to upgrade the electrical.

Claim your other rental expenses, as miscellaneous itemized deductions on Schedule A (1040), line 23.perhaps this source will help you resolve any further disputes on this topichttps://www.irs.gov/publications/p527#en_US_2016_publink1000219164

I try to be a very good landlord, when there is an issue I try to have it resolved within 24 hours, I try my best to fit the customer/tenant with high expectations and I believe everyone deserves a little break.

I have purchased $1,500 worth of cards for personal use from them with only one problem card that they resolved quickly.

VA MD and DC are all great markets and all have Brokers that do not like Seller Financing, that is buying on sub2, lease option (assignments, sandwiches) and wrap around mortgages, all legal but Brokers want "vanilla deals" no risk to their E and O.If you read Shift by Gary Keller of Keller Williams, et al, it says, in Ch 10, Creative Financing,...Creative financing… This is the term we use to describe creative ways to resolve affordability challenges.

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One partner turned out not to be as honest and claims made between partners were resolved and salvaged due to the liens and the issue cured by removal of the offending partner.

Even I bought one that turned out to have an underground aquifer that couldn't be resolved....only house out of 1,000s that I couldn't turn around.

I'm hoping to resolve this peacefully, because this contractor was a friend of a friend, and seemed reasonable and nice up until I called to complain about toilet situation on my way out of town, but I also want to know what my rights are as a landlord for this situation in case this contractor continues to be belligerent. 

You probably should resolve yourself to a non-renew thought process, and sleep easier knowing you will have to stress less than if he came to you on the due date $200 short.