We chose to lower price because we needed to sell, ours was about 10K difference.The buyers could come up with cash to cover difference if they really want it, you could reduce price by a few grand to entice them. 

Then on top of that they charge a 7% Commission (that would equate to additional $26,250).

Additionally, since I was going in all-cash, I could offer seller financing to a potential buyer if HOA assessment delinquencies presented a problem with bank financing.

However, most of that income is offset by expenses to reduce taxes.

I'd like to collect rent on the 1st and then pay the mortgage on the 7th to prevent the lag of pulling money out of my property account just to put it back in within a day or two, but I want to make sure that my interest won't go up in the 6 additional days if I pay it on the 7th.Can someone let me know if that makes sense or if I'm misunderstanding how mortgage interest is calculated?

I purchased the land with the intentions of building additional duplexes in the future.

We had our second home rented out before the closing.At this point and after reading numerous books on real estate, I realized that although we had reached our goal of owning a rental, our finances were completely vertical and I need to spread out to increase cash flow and reduce the impact of a vacant property.In January 2016, I started data basing different markets across the USA.

So I suppose then the best way to do this is to just keep the asset in a Solo 401k and get my portfolio lender to agree to a non-recourse loan, keeping the asset and profits in the retirement account without incurring additional tax burden. 

I have a solid rental portfolio of houses here in Austin, but the cashflow is minimal compared to what I can get in multi-family or in the mid west. additionally, I'm looking at purchasing non-performing notes and turning any of the foreclosed properties into rentals.Are there any strategies for selling off the houses, either in bulk or individually, to minimize the tax burden for when I reuse that capital to purchase non-performing notes?

This allows you to buy the house with the first draw, then take out additional draws to finish the repairs.