Meaning you can sell an apartment and purchase an office building and it's a valid exchange. 

Property taxes and insurance costs are best obtained through local county websites or reaching out to insurers directly for quotes specific to the area.Tools like BP Pro and Reventure can be helpful for an overview, but it’s a good idea to validate their data against primary sources to ensure accuracy.

I am considering getting into this space (looking at some courses), but worried that its too late, and that deep local market knowledge/understanding of buyers/connection with developers etc is required to make this work, which only incumbent/long term investors will have and would be hard for a new entrant starting from scratch to catch-up...is my hypothesis valid in your opinion ?

Since you won't be able to recognize it as a valid rental if you're charging under market rent and you also expect to be covering any house expenses that are outside of her budget, this seems the best choice. 

When I think of Blythe, CA travel centers, gas stations and fast food chains come to mind. 

.: I have similar result, only like 30 - 40% of data yield valid phone numbers.

Virtually everyone has used an electric range or oven in their life but lots of people have no experience at all with gas anything. 

I own a multi-family house that was converted from a single family, therefore, there is only one gas meter.

Quote from @Karolina Powell: @Richard Volkov, the oil and gas industry has something like this. 

Of course not, but required items such as electric, water, gas, and plumbing all need to be in working order.