Many times they advertise for $20k but you can usually get them for $10k-15k

90% LTV HELOCS on investment property-TD Bank advertises this (technically 89.9% is advertised)90% LTV HELOC on primary residence-US Bank advertises this, obviously TD Bank would do this too.Otherwise, the only banks I've seen offering 90%LTV HELOCs on primary residences are local credit unions in my area (Direct Federal and MIT Credit Union).

I know there are several building blocks to a wholesale marketing campaign.

Where my process differs from yours is that, I no longer do letters (for various reasons; too saturated with others sending out letters, too many manual steps involved with setting up drip campaign & returned letters, cost, response time, etc.), so I spent some time implementing procedures to basically create an assembly line to call prospects. 

But that has no bearing on your advertising it 3 bedroom with egress- cost between 600-1000

According to my CPA, we can't deduct it yet because it must be "placed in service" which means it is advertised AND available to rent.

We still have yard signs but some houses don't lend themselves to drive-by advertising as the roads are secondary. 

Specifically in NYC there is strategic value in having offices due to the advertising and financial industries. 

It is on a large peninsula, with one main road, so advertising with a few simple signs covers the entire area. 

The first attorney I picked thought I was acting as a realtor,  so make sure to advertise your contract, NOT the house