I've never claimed to be an expert at anything. 

Does this offer protection of personal assets from claims against the LLC?

He is aggressive and provides great customer service. 

Although the seller would be the customer in a wholesaling transaction, I am not obligated to them in a fiduciary sense.

If you repair one siding in 2015, under the Final Tangible Property Regs, you may have a basis for claiming the deducting currently as a repair rather than capitalizing and depreciating.

Most of the time, I'm doing custom stuff on MySQL/PHP at certain build levels on apache systems, with minimal UI (95% web-based anymore).

I also suspect your TK operator does this to create immediate satisfaction in the customer.  

This may be slightly out there, but I am trying to set up a customer email for my new business.  

All 3 business models you mention (wholesaling, flipping, buy & hold) require that you know how to 1) determine value (after repairs), 2) estimate rehab, 3) evaluate a deal from the standpoint of a flipper or buy/hold investor (the customers of wholesalers).  

Plus, if delivered to the customer, there will be a "break even" point, where they have now paid the  purchase price.