Not sure how many doors you have, but when you get to your 5th broken ice maker you realize the math just doesn’t make sense.

I did not factor the math in as a LTR + STR but just a LTR so it did not impact me financially as it was just gravy.That is not to say yours will, but I notice in the better neighborhoods tenants do not want guests coming in & out.

I recommend a simple spreadsheet to check your math and it will make it simple to adjust each year.End the complaints.

@Ted BarrettIt's not really a rule but a napkin math theory to estimate if an investment is "good" from the twenty teens.

Do the math.

If you can do some math on the potential rent increases post-renovation, that’ll help justify your offer.Don’t shy away from feedback; it’s how we all grow.

Quick math would let you know if this is better for you long term once you turn this property into a rental for the FHA rate + PMI vs a conventional loan with a higher rate. 

In that case, you would need liquid assets of at least $9,000 to secure a mortgage.Calculating How Much You Need to Begin Investing in Real EstateLet’s do the math to calculate how much money you would need to buy a residential rental property as an investment.

Buyan DO YOUR HOMEWORK. 

Monopoly is the one I'd think of, but even sitting down with them and making your own game where they learn basic finances and budgeting (and how to do math) will put them ahead of most people.