Hi @Jackson Pontsler,
All the marketing venues you mentioned above work. Some work better than others but it is very market dependent. For example, if you drive though your targeted neighborhoods and there's 20 Bandit Signs at each intersection, well... You will be the 21 and probably the response will not be that good. We however have clients that love the bandit sign response in their respective markets. Same thing with direct mailers. In some areas the potential sellers are getting 20-30 letters every month and they will tell you this over the phone when they call you. It is cut throat in some major metropolitan areas. So I would suggest you start with one or two marketing strategies and do it consistently for 5-6 months and keep track of the responses you get. Then eliminate the one that is not working and either try another one or put all your money on the one that is giving you results.
Once you get leads consistently and are making money, then add another marketing strategy by trial and error. The important thing is consistency. Don't discard a strategy based on 1-2 months of no responses. Marketing takes time.
Good luck and happy investing!