I have a few signs with my company name, number and website on them. I always post them in the yard of a rehab whether it's for a rental or a flip. I put them out day one and keep them out until they are rented or sold.I generally see an increase in traffic while it's up and I do receive phone calls looking for other properties, so it's working in some way.
I put up signs in the front yards of my rehabs. It generally drives some calls. About half of those are realtors who are trying to get a sense of what the selling price will be so that they can comp other properties for their clients. And there are also a lot of tire kickers who claim to want to purchase but 9.9 times out of 10 are not qualified yet with a lender. So I pretty much send all of these calls to my Realtor to deal with.