Within the next year, ill be doing work to the property laying down some sweat equity.My question is this: In everyone's experience, has nicer (not the cheapest builder-grade stuff you can find) materials translated to attracting a more qualified and responsible tenant?

It is tough to make the single family properties cashflow, and small multi's will cashflow but are in a higher price point, and can require a lot of deferred maintenance.

I invested about 10k in materials on the rehab and have since been slowly updating the house. 

Hi Nicole,LVP is the most well-rounded material on a cost-effective basis.

I have a builder out today who is going to add in some supports until we can get material to reframe the front of the roof.

And when the last guy in the chain can't find a buyer, it's the direct to seller wholesaler, who has spent a lot of money and time to find the seller and market to them, that has to have that tough conversation with the seller about how the deal fell through. 

Tires are tough to get rid of in my market as well.

Without forced appreciation, it will be tough since you started with 100% leverage. 

So not sure the answer but its a tough one no doubt.  

I think if you mean wholesaling in the sense of putting it under contract and flipping the contract, this can be tough for a wholesaler to pull off unless they have a lot of capital available and can show liquid assets.