Highlight any sought-after items that will be available in your sale, which can include furniture, specialty tools, collectibles, and toys.

People always ask how I did certain things in my rentals such as custom light fixtures and refinished furniture. 

You need both elements (high demand and limited supply) sustained over long periods of time to get meaningful appreciation ... having one without the other, or having both for only a short period, and you don't get significant or sustainable appreciation. 

As an investor in Austin, I see our prices moving at a pace that may be sustainable in the short run but I don't believe to be long-term.  

Your marketing efforts are self sustained!

I know about the pro desk at Lowes & Home Depot alreadybut am posting to find out the least expensive place for bulk materials or discounts for Flooring, Furniture & Cabinets.

Austin isn't a market that would sustain a turnkey company.

I think the house shows a lot better with furniture in it (especially if congruent with photos) but that is an expensive proposition to move everything back in to show it.

Every room has beds, each living room and kitchen has furniture and appliances, and there is also washers and dryers in the basement. 

Sounds like you are confident in the how they obtain their income, if so sustain your current collection process.