@Bob Smith high 500's to mid 600'sOther features like a third bathroom or a heated pool allow slightly higher rates and/or contribute to higher occupancy as well. 

If you want a more in depth discussion click my profile and go to my recent podcast I was featured on.

There is a search feature for members that you can use your local area.

You can use the search feature by the zip code and see who pops up.

I agree safe numbers are crucial.

You’ll probably find that they will extend you one with no closing costs and you will have the feature that you are seeking, i.e., Interest Only.

I show new tenants this feature and encourage them to take advantage of it.

I see that this passive part of REI is crucial as you mature in your porfolio.Since I have a very busy full time day job, I'm juggling the time vs. money vs. excitement for REI strings and sometimes failing to find that right balance.   

I like the search features: https://www.biggerpockets.com/search

I like the search features: https://www.biggerpockets.com/searchAlerts can be really helpful too: http://www.biggerpockets.com/alerts