Cost of Living quick-and-dirty Calculator

We assume you have a house and you consider selling it and investing the money, say \$300,000, in some "safe" investment at, maybe, 5%.
You're considering renting instead of owning.
A condo requires no maintenance ... and that's just fine with you, if you can afford it
You'll have your normal take-home / after-tax salary (from whatever sources) PLUS income from the sale of your house.

• Should I rent the condo, knowing that the income from that \$300,000 will help pay the rent?
• What percentage of my after-tax income will my expenses be?
• If I keep the house (so I don't have that \$300K to invest), what's that percentage?
• Anybuddy got an envelope so I can do back-of-the-envelope calculations?

Rent a Condo:
Annual EXPENSES:
 Condo/Apartment Rent (if you rent a condo) = \$ Gas / Electricity / Water = \$ Phone = \$ TV = \$ Water Heater Rental = \$ Condo Insurance = \$ Car Insurance = \$ Car Gas & Repairs = \$ Property Repairs & Maintenance = \$ Groceries = \$ Vacations & Living it Up = \$ Other Stuff I may have forgotten= \$

Annual INCOME:
 After-tax Income / Salary = \$ Investment from Sale of House = \$ Return on Investments = % Tax on Investment Income = %

Total EXPENSES as a percentage of your Total After-tax INCOME = %

Keep the House:
Annual EXPENSES:
 Property Taxes (if you have a house) = \$ Gas / Electricity / Water = \$ Phone = \$ TV = \$ Water Heater Rental = \$ House Insurance = \$ Car Insurance = \$ Car Gas & Repairs = \$ Property Repairs & Maintenance = \$ Groceries = \$ Vacations & Living it Up = \$ Other Stuff I may have forgotten= \$

Annual INCOME:
 After-tax Income / Salary = \$ Investment from Sale of House = \$ Return on Investments = % Tax on Investment Income = %

Total EXPENSES as a percentage of your Total After-tax INCOME = %

P.S.
There's a more sophisticated calculator spreadsheet here.