Driving for dollars, direct mail campaigns, SEO and PPC ads, facebook ads, cold calling, mailing lists.

Eventually, I will work on more online stuff such as PPC (pay-per-click) and SEO.

I am having lunch with a friend tomorrow who is KILLING IT with SEO and PPC. 

., TV commercials, radio ads, motivated seller websites, SEO, pay per click/adwords, facebook, Linkedin, Youtube, and other forms of online advertising and boosted/promoted social media postings.Bottom line is integrity and consistency.

. [$2000 - $3000 /month]7) Drive said paid traffic to your credible website WHILE you focus on SEO (to start generating free actually motivated seller leads)8) In about 3 weeks to 1.5 months you should see a steady flow of leads coming in9) If you did a good job with your ad targeting, these leads should make you about $20K to $30K the first few months10) Now you hire an acquisitions manager and a receptionist [$4K to $7K/month] but you don't feel it because you are making about $20K/month11) With these people in place, now you can scale to double the deal flow, so you are now at $40K to $60K/month12) Now you triple your marketing budget13) Scale income even more.14) 3 to 5 months have passed since you started this and suddenly your first organic leads start to flow in.15) Now your profit/lead has doubled (organic leads are WAY better than paid leads)16) Now within 6 months you now make $100K+?

Get an SEO to work on your internet presence and site.6. 

I would consider outsourcing facebook marketing to a company like silver street marketing (http://silverstreetmarketing.com/), having investor carrot do your website and have them all your content, outsource your SEO to investor carrott or another company.

How have other buy and hold investors handled the influx of leads through lead generation (albeit direct mail, lead generation website, seo) but not become wholesalers?

I have some knowledge about internet marketing and i have some freelancers that can do website and some SEO.

Moving forward you can "blog" or post about your recent flips to build SEO rank and additional credibility after you have done some deals.