Visit with your agent about what level of coverage / protection is available, and what they might suggest as being adequate for the size of building you're referring to above. 

From time to time I will write my own yellow letters, but it takes HOURS to even get a fraction of an adequate amount done. 

I'm wondering if your volume and repetition are adequate to give you a good chance.

what's too much what adequate for a reliable fast service.

So, I gained some insight here (which was the point of this post...I think)1) The majority agrees that wholesaling is a necessary evil (except for those that claim to be "professional wholesalers")...2) The only reason wholesaling exists is because there is a lack of licensed agents in the overall RE market to adequately meet the needs of investors (agreed and agreed)...3) Individuals ("investors") would rather educate folks to become good wholesalers through continued discussion of what not to do as a wholesaler so they can profit more in the future when they buy from them...?