No realtor is just going to run comps for you unless they are a good friend of yours, and even then, they usually will run them incorrectly.

Perhaps one day I'll get around to trying it again, and hopefully their interface has become more user friendly, but I was hugely turned off by them last time.

Best part is NJ is not what its made out to be in terms of landlord friendly, the state gets portrayed as the entire state being bad when really most wacky laws are in the major cities and they apply to 5 units or more.  2-4 unit multi families fly below radar per say. 

One more thing, especially for people who don't meet my criteria, besides more deposit is required, I also do a interview with them, not interrogation style, more like a friendly conversation to figure out their situation.

The owners became friends with the tenants and do not feel comfortable raising rents on their friends. 

The area tends to be more owner occupant friendly rather than renting.

Connecting with an investor-friendly agent in your chosen market is also a good idea.

These software are often excellent platforms for tracking income and expenses for investors; being user-friendly.

I'd also suggest speaking about Real Estate with friends, family, neighbors, and anyone else in your sphere of influence. 

But there is no black and white guidance that I could find.And, in conclusion...1st conclusion: no FICA until the child's 18th birthday.2nd conclusion: tax law is muddy (I would add two capital letters, but it's a family-friendly forum)3rd conclusion: pay your CPA, we have to deal with it daily, and it takes skill