I've had a rough couple years because I had to evict a tenant, which added legal fees, I've had abnormally high turnover, and I also replaced a fridge

I've read they hate the smell of mint, so I'll put out some mint-based repellent pellets under the stove, fridge, etc.

The toilet needs to be fixed, fridge water/ice maker broken.

Right: one of the two has a small counter, sink, microwave, and mini-fridge.

Flip the handles on that fridge if you're going to keep it.

Finally, can you lose the pantry/fridge wall? 

My point is, and I hope this would never happen, but I don't want to have to pay a $75 service fee every time something starts going wrong not due to damage (e.g. leaky pipe/faucet, leaking water line behind fridge, leak from washing machine, clogged dryer vent, leaking water heater, A/C condenser fan gave out, furnace stopped working because the control board went out, etc etc etc).

Was filling out a police report standing at the property when someone showed up to pick up the fridge...

If a fridge goes out, that wipes out more than a year of reserves. 

Unless you also mean the $300K house will be double the size and quality ($2000 fridge vs 2x $1,000 fridges, 2500 sq ft vs 2x 1250 sq feet of roof) and therefore have double the repair and capital costs over time as well.