That's why my friend—who's a real estate investor—and I decided to develop our own tool.

If you have expertise in this area, I’d greatly appreciate any advice or recommendations for tools or systems to streamline reporting and organization.Thanks in advance for your insights!

2) would propstream be the best tool for this?

Use tools like Zillow, Rentometer, and local real estate listings to compare prices and rents.

Recently some tools disappeared (not mine).  

If you’re considering handling tenant placement and rent collection yourself, there are tools like Zillow Rental Manager or Avail that can help streamline the process.

With some effort and the right tools, you’ll find your groove on social media marketing!

Once billed, those in violation of the policy won't be able to rejoin BiggerPockets, including prohibition of the use of the agent/lender finder tools, forums, and private messaging system until their bill is paid. 

Maybe when you get over 5 you can start to look at management suites.VRBO and AirBNB have all the tools built in to manage.

Be sure to check out the free tools BP provides to help analyze deals you may have and also market insights.