Is it common for a commercial lease to require tenant to pay proportionate share of the property owner's Taxes and Insurance?

This are pretty common on for sale signs just never worked with one of these companies before and looking for suggestions.

I'll like to think this is not a unique situation but rather more of a common one investors encounter when buying properties. 

Question for the experts: is there any reason to not accept prepaid utilities and monthly pet fee?

Cash flow = Rents - PITI - Expenses (Property Management 10%, Vacancy 8%+, Utilities, Repairs and Incidentals, Capital Expenses fund, Legal and Accounting)9.

In my opinion the ONLY thing all successful real estate investors have in common...

I've moved into one side and am loving the area but I need to rent the other side soon to actually start having the building (slowly) pay for itself.The duplex has almost fully separated utilities except water.

I'm not an economist or anything but there are a lot of businesses that are embracing remote work in efforts to save money on office space and utilities, not to mention offshoring.

I've contacted the management company and explained the situation, stating that we are seeking a licensed plumber and if it's ok to start the job because, most likely, it's a common area issue.

It's very common for small business owners to understate their expenses and overstate their income.The overstatement usually is in the form of "We don't run everything through the cash register", especially in a cash business.