But they sacrifice the tax savings and compound interest effect of the 1031.You may want to look at switching your strategy from buy - fix - flip.  

Will this effect credit at all, having these accounts / card?

This so-called tipster, coach or ripoff, has a blog on bigger pockets and explains that these post cards are what HE USES and has found them to be effective!!!

So now I'm trying to create a mailing campaign that's effective but also cost friendly.

The property owner will always be responsible for handling issues that effect the safety and habitability of the property and that effect the proper function of systems and fixtures attached to the property.

A landlord can modify all their tenants leases to effect a entire building in a short time frame.

The effect is potentially quite significant, but that doesn't mean that the proposed investment is not the best one you can make for your plan despite the taxes.

What I found most effective is finding someone who wants to learn the business.

Not sure how that will effect our business once it is fully set up.

Scott's books on flipping and estimating rehab costs are also great sources of info.As far as wholesaling is concerned, Find out: Your target area; ALL costs of a mail campaign (list, letters, postcards, necessary office supplies, postage, etc); budget for 6 months-1year of mailings; develop scripts for prospective sellers (what to say to them); learn to track responses, follow-ups, conversion rates, overall campaign effectiveness, etc.Build your team; title company, RE attorney, cash buyers, closing agents, etc.Feel free to reach out if you need any info.