The reno on the other hand may go over budget with unexpected expenses.The other question is single family vs duplex. 

There are always unexpected issues.

There are a lot of moving components here, possibly too many. 

Compared to an IRA, Solo 401k contribution limits are roughly ten times higher.The Solo 401k will allow you to take participant loans while the IRA does notThere is no custodial requirement for the 401k.You don't need the additional expense and administration of an LLC to have checkbook control.There is a built in-Roth component whereas IRAs are either traditional or Roth, not both.A spouse can also participate in the same Solo 401k plan.

@Kelly DeWinter I think a key component of the marketing plan is demonstrating value.

About 2.5 years ago I decided to try Fund & Grow after doing my due diligence (which included contacting my Attorney, online research and talking to former/current members).  They did an awesome job submitting my ...

I have three long term rental properties 700 miles away and they constantly throw up some kind of unexpected problem.

What if you get unexpected expenses or more vacancies than you anticipated and can't make all those loan payments?

Single and small multi both have their merits- i prefer small multi :)Also, here's a section of a post I just made on another thread about a more detailed method of cap-ex calculation:Truly, the best method for the over analytical, is to segregate the cost of replacement vs. remaining lifespan of each component of the property & find out how much need be budgeted yearly until replacement of that component comes due.

Great example of how to use youth as the only component of your life.