That's the biggest thing I've read.

Our brain is our biggest asset.

My biggest advice is that this is more a people business than a knowledge business.  

The one downside I see since you already Roth IRA funds, is that the Roth IRA cannot be transferred to the Solo 401k.

My biggest problem is that I have little to no money to purchase a house and flip it.

My biggest fear is relying on a reliable property management company.  

Love B/C to have downside protection, but w/value add approach picked up at relatively good values the ball is in the sponsor's court per say and not relying on the market forces as much.

Joe's brother-in-law buying Joe's house at a short sale would be a huge red flag for fraud.I think the biggest arrow in your quiver is #1, and your most probable path to success is to order a fresh appraisal with a fresh opinion of value, and once it comes back go to your (or the end-lender's) appraisal department (not the AMC, the lender's internal folks) and argue that the new appraisal is more credible than the previous one because of #1 ("if the appraiser didn't even go to the comps for a quick drive-by photo, who knows what else he didn't even actually do?")

I imagine that the length increases by some amount, but I doubt it would be a full year since many tenants feel fine riding out a month-to-month lease until they decide to leave.Do the downsides (forfeit of owner ability to increase rents after the year and potential to get stuck with a trouble tenant constantly calling for minor repairs) compensate for whatever this additional length of stay is?

In my experience, the biggest reason these loans take a bit longer is due to the time it takes for the borrower to make decisions about what work they will have done.