If you have "high-end" units where you feel a disposal is a MUST for your prospective tenants then perhaps it is worth it.One way to keep the costs down is to inform the tenant that if they jamb the disposal or if a foreign object is found at time of service then they will eat the cost.

No need to test just be careful with it (don't eat, wear respirators, clean up thoroughly, have drop cloths/paper down, and disclose it to buyers). 

Don't people need to eat?

If you can get into some properties in Salem or Nashua that might make sense too but the tax bill might eat a good portion of your profits. 

Even if you don't like it that much, you eat it because it's free

The fees can dip into your profits and eat at your cash flow.For older homes: The upside is they offer the chance for more cash flow and equity through smart upgrades.

Take it on the chin and eat the 3 years of holding costs and increase in construction costs?

My turnover costs with LTR eat me alive, so I'd rather spend a bit upfront and just keep it nice.

Don't just eat up everything you read and hear.Start asking questions instead of taking everything for face value. 

At least the government wants to keep interest rates down so government interest payments don't eat all government income, but that may mean they don't raise them enough to keep inflation under control.