I've been searching online for real estate agents and property managers, and it is so hard to know whether someone is actually any good. 

In today's world, my seller would have had to disclose this potential issue in the selling documents, but he was probably within the limits of the law at the time (the 1980s).I wasn't so lucky when I first moved into my present apartment.The building had quiet hours written into the lease.

So my first question is, from the online listings not everything is always there, so what information is key to ask for (for multifamily anything from a duplex to a 10 unit building)? 

There are quite many Accounting apps to choose from.For me, online database (keep track of expenses from anywhere with phone/laptop/assistants) and receipt scanning through phone are the 2 most important features.

I'm starting to look into online advertising to see if the ROI is better there. 

We are having an issue collecting all the documents..

Hi, I am looking to build a rental portfolio this year and was looking for some referrals for a good CPA and attorney who are real estate savvy.i have tried to find some online, but none are real estate-friendly. any suggestions?

There is a lot of free information online (CPAs and business attorneys in particular will often talk about the differences between them in blog posts). 

I imagine most buyers do find their house online, but probably an MLS listed house that shows up on all of the search engine.If you aren't in a hurry to sell, give Zillow a couple weeks/month and seen what happens.

The great thing about online is there is transparency.