However, I suppose it depends on your situation.I know some people who borrow from their 401k or use an IRA to pull from.

If you are purchasing an investment property, and intend on using for investment purposes only, not personal use, it might be possible for you to rollover the TSP to a Self-Directed IRA and purchase the investment property through this type of structure.

Client reduced price and using Direct IRA financing.

I use Advanta IRA and have been happy with the level of service that they provide.  

I was able to do a HELOC on my primary and tap into some of my Roth IRA $ (tax free) to come up with the 130k since all I had to my name was 25k in savings.

Our capital has been tied up with a note out of my IRA so we haven’t bought anything from anybody yet, but Missy is high on our list of prospects.  

Stessa for the rentals, Monarch for the other accounts (IRAs, brokerage accounts, cash, etc.)

If you violate any of these rules you could blow up your IRA or 401k and the IRS could force you to distribute all of the assets in the IRA or 401k.

Forget the technical name like an IRA.

. - The minimum investment is $10,000 (or 2 shares) so small-balance IRAs, HSAs, and Coverdell ESAs may participate.