I target the listed houses in specific zip codes with my tri-fold brochure and postcards.

Look at what it will take you to develop an entire "system" - your brand, logo, domain, website, phone #s, signage, business card, postcards, letters, SEO strategy, etc.

Are you sending letters or postcards?

Joining a strong, established team also works.If the person is only going to send postcards and wait for people to call then you can do that part-time.

i want something where i can just add a name and address, and it will send them letters.i have non mets, mets, and past referrals for all people that id like to send postcards or letters to asking if they want to sell their house 

Without passion, most people get bored when the "quick" part of the Get Rich Quick plan doesn't pan out ---- I truly believe  there is no better path to wealth than with real estate - BUT, it is more of a Get Rich Slow plan -- To be completely frank with you, (like I said in my email) I do believe that wholesaling is a difficult road to riches .... there are a TON of "investors" sending out mailers for the same motivated sellers you will be marketing to (I get about 15 letters/postcards a week) so the odds are against you and it will be an uphill battle ---- BUT you seem to have passion, and when you have passion on your side, perseverance will take you a LONG way.I started out trying to wholesale and fortunately, I was a terrible failure .... my failure caused me to keep my first wholesale deal as a rental property --- less than 6 years later, I resigned from a $150,000/yr salary career to spend my days doing whatever I want ....  

Over the last couple months, I have started getting more post cards and letters from realtors offering to help me sell.

@Jonathan SteeleI agree with @Paul Hitchings - Every GuRu or Real Estate Investing course seems to push wholesaling as the thing to do to get started - Primarily because they say you can get started without investing any money - What I am seeing in my area is that every beginning investor and their uncle are sending me postcards wanting to buy my properties - I get about 5-6 per week.  

I'm amazed at how many postcards I get with hard to find contact info....and when I do call they never return my message.

My target market was not clearly defined, I dropped mail too far apart (I was mailing quarterly), and my overall marketing budget was spread too thin (I was doing postcards, hired a va to do internet marketing, and I was doing shared mail).