We use DealCheck to underwrite deals and QuickBooks Online for everything related to accounting and numbers.Classes allow for separate P&Ls for each property.

Been getting nowhere with zoning laws found online and in the local library for Yonkers (in westchester county) as to whether any permits are needed in order to operate such a business. 

When talking to property managers, ask questions regarding any guarantees they offer owners and refer to any online reviews to get a better idea of how tenants and other owners feel about working with the company.

Luckily I was in a buyer's market at the time, but about 75% of agents did not even respond to me and I could not set up appointments online because I was not a MLS member.   

He has no social media, no pictures, no videos, no online presence, nothing.

I have found no record of him online aside from self-published articles made to make them seem more reputable than they are.  

Checked info online and should be getting some sort of updates, but nada.

If there are barriers that limit similar supply and you figure out how to get the housing units online, even better. 

A lot of that is referral based or people find my site online, organically. 

I began inviting them to online zoom meetings I would hold with brokers, agents and investors... friends I had made along the way, where we would just talk strategy, loan types, current market trends etc.