Let’s say the work is limited to someone installing a new electrical outlet - something simple and quick like that.

It was so unexpected

You make a very wise point, I need to make sure I have a strong enough cash reserve just in case i find a great deal, or an unexpected expense comes my way.

You are willing to pay $87.5K for a place worth $67K and now there are about $20K in unexpected repairs. 

Other appliances with electronic controls may have similar test modes.Because of that electronic board in the fridge, I bought a small one-outlet surge protector, and plugged the fridge in through that. 

Also the DSCR will vary and can be increased using more equity and interest only debt which is how a lot of more aggressive deals are getting done.Always best to air on the side of conservative as you will always have unexpected things pop up no matter how thorough your analysyis.

You don't want a credit line fully utilized when an unexpected event happens that puts you in a financial bind. 

The Rehab needs a new foundation which is unexpected.

My first real estate purchase was a fixer upper in Everett WA.Bought for 270k, I ended up as a unexpected landlord renting out to friends when I left for a work.

I currently rent the basement out as its own suite (it has a living room, separate entrance, bedroom, fireplace) for $900/month, one upstairs bedroom for $700/month, and the other for $650/month for a total of $2,250/month while I live in the master bedroom (if you read my blog it will say I'm generating $2,300/month as I was at the time but one of my tenants moved out unexpectedly so I listed the room $50 lower to quickly fill it).