This could be better than a rent concession because it is a built in rent increase.

(interior at hot water heater)$55 + 57 for the meter(S) and 900 for the 3g data logger, which is 20-30 per months for 3g service. 150 setup fee for customer billing management and a kick back from the tenant of 5-10 for convenience fees.

This increase is rents is now your cash flow.

I would either charge the tenant 40% of the monthly utility bills or get a estimate of a full past years utility costs and increase the tenants rent by 50% of that cost.

I would physically take home ~$200 more per month after all payroll deductions.Should I wait another month for my income to increase prior to applying for a loan, or go ahead and get approved this week as planned?

Look at the apartments in the area of your condo, these apartments are going to be your direct competition, you'll need to offer something they aren't offering to win the customer between the two of you.    

By making one side of the duplex a 3/2, will this increase my reappraisal value if I’m trying to do the BRRR strategy?

I feel like there is a lot of risk as is— adding more just increases your risk of damages.

Prices may be many times that in certain rent controlled situations.My suggestion is to research the laws and customs in your target city.

Home of the perpetual double digit increase in home prices.