Found out later the property manager TOOK the cash from the tenant and went and paid their own cell phone bill among other things.The landlord did not find out until they went to the tenants door without telling the property manager and asked about payment.

Initial up front cost to buy the training, time it took to learn/implement, monthly costs (dialer, skip tracing, etc), how you are skip tracing/phone appending large lists and if you are getting accurate landline/cell phone data, etc.?

If the wiring was all correct, these high power devices would simply pop the breaker. 

Sounds like this tenant is seeking attention; sort of like a dog that wants treats and barks and barks until the treat is delivered - congratulations, the dog has been trained to bark even more.What I'm getting at is the messaging to you has been the tenant seeking attention, and you supplied it; now the tenant is very aware of the attention getting device, and how it works.

A true ESA is considered a prescribed medical device, not a pet.

I've just been using my cell for everything but I haven't had much turnover and do not have needy tenants either.

For construction costs I’d factor 200,000 250,000.Things you need to check: Service size of water (might need think of a pressure booster), electrical service panel, spray foam entire home I would recommend closed cell spray foam, since this is higher r value and moisture barrier. how is the structure of the building?

I've already suggested to him to get traps and buy those pest deterrent devices from a home improvement store. 

More than two of one kind becomes a pack and the owner really doesn't care for the animals and they are often left to their own devices.

Nobody knows it is a service.Also, using an app called You Mail, for my cell phone helps manage voice mail much better than default programs.