Leverage accelerates growth, even in the case of an IRA with exposure to UDFI.When either UDFI or UBTI is present, the resulting tax paid is UBIT.A multifamily investment such as queried by the OP on this thread may commonly use leverage and may have exposure to UDFI taxation. 

Such loans can be "accelerated".

If you’re looking to invest full time, do some high level stuff (developing, syndications, etc) and make a career out of it then I would suggest you find a reputable, proven mentor and gladly pay them(within reason) if you believe they will accelerate your timeline to achieve your goals.

This is of course excellent for risk reduction as you're accelerating the payment of the note.

Personally, I only accelerate higher risk and/or higher rate loans and I have quite a few free and clears. 

They typically charge a flat fee and since they're so specialized can usually accelerate the process for you.Separately, you might want to consider purchasing rent default insurance at some point.

And those increases actually accelerated during the recession.

No disagreement with you except on the subject of having the note accelerated.

One being, using it for tax benefits through cost segregation where one reallocates assets in a property to personal assets and it allows owners to take accelerated depreciation.For example a $2m building with negative cashflow can mean a $500k depreciation (and tax deduction) on year 1.

Do folks who own turnkey rentals with positive cashflow tend to pay down the principal on an accelerated schedule?