You really need to walk through a neighborhood both in the daytime and night, to get a good idea as to what you're getting into.I've owned 50% deals which proved to be huge losers because the neighborhoods declined and I couldn't retain decent tenants.

About 3 weeks ago I got four contracts to purchase houses in about a five day time span.

Nightime can be totally different than daytime, as well. 

Therefore, in addition to participating in your day-time employer's 401k plan, you can also open a solo 401k for your part-time self-employed business and transfer former employer 401k or IRAs to the solo 401k and then invest in real estate.

It is a commitment from the investor that within the 90-day time window of property rehab & refinance, the investor won't go and buy 3 Lamborghini's and co-sign on 10 cell phones (thus damaging their FICO) and will be able to refinance out of Blue Moon's hard money loan.

@J Scottexcellent point about withdrawing from your retirement account to fund a short term project and then returning the money to a retirement account before the 60 day time limit is up.As far as the court case, until there is actually a successful challenge to the Tax court ruling, I would suggest erring on the side of caution because the IRS (at least some part of it) is going after serial rollovers and if they prevail that is a huge penalty to pay.

., your day-time job), the employer contributions made to your solo 401k stemming from self-employment will have no effect on the amount of employer contributions your day-time job make to the 401k sponsored by your day-time employer.Employee contribution limits are determined on a per individual basisThe salary deferral contribution limits are determined on a per individual basis.

This includes all people staying and any applicable daytime visitors. 

Is that 2 day time frame referring to actual days, or "business" days?

A little bit about myself: Day-time, I do project management for corporate real estate clients, and a registered architect.