There is no doubt that REI in Section 8 is risky, but the entry point is attractive with leveraged yields well in excess of what you can achieve in regular REI.  

Doubling seems excessive unless they went from $500 to $1000. 

I just had about $700 in excess water charges due to running toilets!  

This is a good question that people on here should be able to give you ideas about what seems appropriate and what would seem excessive.

So, even if 1 property has excessive expenses in a given year the other properties carry it.

When a tenant moves out, transfer the deposit back to Checking so it's ready to apply towards expenses or refund the Tenant.If you end up with excess funds in the Checking account, I recommend you transfer it to a third account designated explicitly for future investments.

Due to the excessive demand of shelter in NYC the city had to develop strategic programs to assist people with moving out of shelter and with the explosion of rent prices in NYC many people are looking to other cities close to NYC such as Newark, Irvington, Jersey City, etc.. to find apartments they can afford. 

@John ParkI don’t find those fees excessive for those amenities.

Pest control- we put mouse bait out along the fencelines and under the units, mow excess weeds and grass.

You should only consider switching when your current software has a significant flaw or lacks features that force you to spend excessive time on workarounds.