So far I've been using Taxes, Insurance, Water, Trash, Power, Management fees, Vacancy, HOA, and Gas as my expense metrics.

And even if they do, the purchasing power of your defined payout reduces as you age.Social Security has to change how much it pays, when it pays, and/or how much it taxes to stay solvent.

Fourth, the power of life insurance is in the tax-free status of the earnings.

Not sure why these people want to ‘add me’ but I figure if it helps them somehow more power to ‘em  

If you want to do that permanently with hard wired heaters you may have to upgrade the electrical service to have enough power. 

One final Tip that has help me: Be sure to build your POWER TEAM: Your team should include a good Attorney to help close your deals, an Accountant you can call-on as needed, an Appraiser, Inspector; and a Database of Investors and potential Buyers to help you to close/move your deals, etc.Much Success to you---DelinquentTaxSaleInvestor

I feel introducing them /letting them pick might not be the best as that could lead to real abuse if they feel they have power over the tenants. 

Power wash, bondo/metal work, and paint.. will be good as newKitchen: Old vs. current state --> gutted, with all new cabinetry.

It’s a stable business and necessary service, for sure, but doesn’t have much pricing power or growth opportunities.  

Some of the most powerful factors in real estate are control, debt (leverage), and taxes.