I haven't seen a great data source for rental growth for single family homes. 

Just going off the data you have given, the park is running a 91% expense ratio.

This helps ensure the contractor stays with the job for quick completion. 

We've been utilizing biggerpockets' tools and have built our own excel spreadsheet to quickly analyze data-dump from mls reports. 

We don't get allot of data on the near misses.ThanksKirk

I am from Illinois and I am extremely conservative on my calculations to ensure worst case scenario all turns out well.

I am considering a business idea that includes buying real estate around my area and converting them to rent-able offices and/or data centers for leasing out computing power. 

It is always a good idea to evaluate the home insurance policy annually to ensure we have enough replacement cost coverage in case anything bad happen. 

Part of this is also seeing plenty of data in sold comps since I opened this HELOC verifying that the actual value of my house has gone up a solid amount as well, so hence the extra motivation.  

What's important to note is that while they may not report to the agencies, therefore not be factored into your DTI, you need to monitor your debt levels to ensure you're not taking on debt obligations that you're unable to afford.