A property management firm is well-positioned to oversee this element of the process.If you are selective in choosing your guests, it's not uncommon to spend time and money vetting a potential guest yourself, and if you ultimately decide against renting to that person, there's no way to recoup your time and money expenditure.

First, I would recommend budgeting ~ 4-5% of gross rents for Capital Expenditures ($130-165/month),  ~4.5-5.5% vacancy($145-180/month) and at least 3-4% for repairs ($100-130/month).

This type of product would best apply to large properties in my opinion (100+ units), because they have the revenue to sustain these types of expenditures.

US citizens bear a small percentage of the cost of taxes evaded because most government expenditures are financed from sources other than income tax (62% of 2018 expenditures [52% of the budget] came from sources other than the income tax) and because the most the devaluation costs of creating additional dollars to cover unpaid income taxes are borne by foreigners (63% of US dollars are held by foreigners, only 37% held by US citizens in 2014). 

But like @Jon K. said, there are too many variables to say what the income off a single-family property should be.I would run your numbers.Monthly Rent minus all of your expenses...Property TaxesInsuranceUtilities (often you don't pay any of them for a single family)HOA (hopefully you don't have one)Repairs (many take around 8% of rent)Capital Expenditures (many take around 8% of rent)Vacancy (many take around 8% of rent)Property Management (around 10% of rent)Mortgage payment (principal and interest)If you are a still making $200 in cash flow per month after all of that, you are doing well.

Will your property generate enough income that you can pay taxes and insurance, you'll have enough profit AND you'll have the cash to pay for all the capital expenditures that come up on occasion?

It does not apply to rotable and temporary spare parts that the taxpayer accounts for under the optional method of accounting under § 1.162-3(e).Neither the IRC nor prior regulations included a de minimis safe harbor exception to capitalization; you were required to determine whether each expenditure for tangible property, regardless of amount, was required to be capitalized.

I established my LLC as soon as I knew I was going to have expenditures for my future investing business.

In addition to that idea, you do not seem to have money set aside for unit reserves which may erode your profit numbers a bit more or capital expenditures as a whole.

However, I know it's just a guideline.When my partner combined taxes and some projected expenditures it essentially plowed through 50% of the rental income.I don't think $100/ month allotted for Maint.