But they need a security deposit of around $1500 .  

Value-add from increasing NOI through various methods of increasing income (below market rents, rehab and increase rents, RUBS, etc) or decreasing expenses.

The line is properly capped, turned off and secured when the tenant leaves.

Also, am I allowed to deduct the cleaning supplies I bought from the security deposit as well?

I would recommend a different marketing piece every 4 weeks for 5-7 months from past data analysis, but you should test this out for your market and see what works best response rate wise.Also, when you become more advanced you will want to do split testing and other methods.

I’m sure most of you have seen the recent article about the BRRRR method.  

You're trying to deal with secured creditors earning a good interest rate.

I have 4 properties using this method. 

and how much profit you are willing to take with each method.

If they have a weakness in residence/rental history, income/employment history, financial/credit history, or legal/criminal history, but generally meet all of your significant requirements, then collect more security deposit to cover your risk.You can download an example of our Rental Criteria, as well as Tenant Screening Questions, from the BP File Place if you're interested in seeing some examples.