Would like to know your opinion on this type of gas valve. 

Given the zip code and the price, this is not a purchase to be done sight unseen.You would also need to find out of each of the units has separate electrical & gas meters. 

Luckily I will be doing this on a full time basis and the many years of project management experience in Oil and gas Services contracting should be of some help.

As an example, if a couple brokers say that it should be a gas station, ask them to speak to a few gas station developers who may be interested and work out a partnership with them or pay them as consulting fee for helping you set it up.

Although there are three gas meters for each unit there are only two electrical meters.

Frank,I am a mechanical engineer myself and moved to Houston to work in oil and gas!

I was just wondering if it is okay to have a gas range at the very end of the kitchen. 

The only reference I have is for my duplex and triplex properties in CO; sewage, water, garbage and share common area fees paid by me (about $200/mth; tenant pays gas and electric.

It is heated with a gas fired boiler that costs approximately $40,000 to operate each year. 

You may want to sleep there or use dry gas to attract them...CO2 is what they track.