@Eli K. Hi Eli.
In a nutshell:
Any rental income (rent received) from your rental property is reduced by cash and non-cash deductions (expenses).
Cash deductions: pretty much any out-of-pocket expense related to the rental property like management fees, RE taxes paid, mortgage interest (i repeat, INTEREST PORTION ONLY), utilities, repairs, insurance, and so on. So, if you spend money on your rental property, it should be deductible, but with some caveats. Some expenditures have to be capitalized, like major improvements.
Non-cash deductions: depreciation on your property, improvements, equipment. You take a portion of the value each year (usually over 27.5, 15, 7, 5 years) as a deduction. Depreciation does not reduce the value of your property, it only reduces your basis in the property. So, when you sell the property your gain on sale will be calculated based on adjusted basis in the property (original cost + capitalized improvements & purchases - depreciation).
SO (in a nutshell):
Rent received + any non-refundable deposits = Rental Income
Expenses (non-capitalized) related to the rental property + depreciation + your travel = Rental Expenses
Rental Income - Rental Expenses = Taxable Rental Income or Loss
Depending on your situation and income level, the rental loss might or might not be deductible. If not deductible in current year, it will be carried over to future years. If when you sell the property you still have unused loss carryover, you can apply it to reduce capital gain on sale.
Feel free to reach out with questions. I have clients who invest in rental properties in different states.