There are a lot of people on BP who seem to have no desire to ever accelerate their mortgages...why would they if they're locked in at a historic low rate...all they have to do is patiently wait and a tenant will pay it off for them over time?

The San Francisco Bay Area reached its peak acceleration in the velocity of sales price increases last year.

If that $100-$200/door is just on the first day, but they are super high quality doors with a long history of appreciation in both rents and prices, then that is a totally different story and that would accelerate your progress and you will get there much faster than you may think.

Since I do not have much capital anymore, I am looking to accelerate my investing strategy by house hacking a Fourplex and using a FHA (3.5% down).

., the lender can still accelerate your loan using that strategy.

You can also check meetup.com or search facebook for real estate investment groups, clubs, or meetings in your area.A mentor can really accelerate your growth, no matter what level you're currently at.

Having said that, it's been a great way to accelerate the growth.

Realize, just because you accelerate the depreciation on stuff, you'll still need to pay for depreciation recapture at about a 25% rate - Unless you do a 1031 for deferral. 

HaleyThere are different ways this can go. 1) if you acquired the property in the current year, you would put the assets in your depreciation schedule just as any other asset and take the benefit of accelerated depreciation. 2) If you did a retroactive cost seg, you have to file for 3115 and take the adjustment as section 481 adjustment3) If you did the cost seg on the properties that were acquired last year(only one tax return has been filed), you could amend your return from the prior year. 

If you're making $500 per month vs. losing $500 per month it's a $1K swing that could seed (or accelerate) you next property purchase.