@Brian Eastman The black art of Economics dictates that one always ask the question "Compared to what?" when considering whether or not to participate in a particular economic transaction.
- Assumptions in my case: The money was going to sit in a MMF earning close to nothing (not my entire account but this 50K).
Let's compare the scenarios with 50K borrowed from a SD 401K vs HELOC:
50K borrowed at 4.25%
Total Interest 5,589
Total Cost with SD 401K:
Loan Setup Fee: $200
Interest 5,589
Total Cost 5,789
Total Cost with HELOC:
Origination Fee (4%) 2,000 (assume 4% includes origination, doc stamps, appraisal)
Interest 5,589
Interest deduction saved at 32% tax bracket = 1788
Total Cost = 5,801
In reality the 5,589 interest goes back to my bottom line returned to the 401K with after tax dollars paid by a renter (in my scenario). The opportunity cost of not doing this deal for me was income I would not have had. Oh and let's not forget that I have the ability to also shield some of the income from the property acquired with this down payment via depreciation against an income stream for 27.5 years.
If the 401K was not SD and company provided it is very likely that the fees would be higher and that the interest would have gone back to the plan provider instead of my account. In that case your concerns are valid as the comparative advantages are diminished.
I challenge any CPA to call themselves qualified if they don't think the above scenario makes economic sense.