Tenant wants to fix appliance

[Kyle M.]

So this is my first issue as a landlord. I told my tenant that I will check with my "partner", which is really BP. Basically there is a part in the washer that is broken. My tenant builds car engines and is confident that he can fix it. He says the cost of the part is $20 and is willing to buy it. Also, getting an appliance guy out there is proving to be troublesome. I would prefer to get someone licensed to fix it. Given the circumstance, what is the best way to handle this situation? Thinking of him buying it, and me deducting from rent. Thoughts?