The federal government does not set private sector mortgage rates, we aren't in a communist country. :) The federal funds rate is just the rate that the Federal Reserve Bank will lend at overnight to private sector banks, what those private sector banks do is then entirely up to them, but obviously borrowing at a daily interest rate and then lending for 15 or 30 years isn't what they are doing (they'd go bankrupt).That being said, that rate on a 15YF seems absurd.

My question is, would it be better to start a new LLC specific to my real estate investing path or should I look at doing a DBA while still using the entity's official name on all government documents?

For leases entered into on or after July 1 2020, the owner would only be permitted to occupy the unit, if the renter agrees in writing to the lease termination or the lease includes a provision providing for lease termination based on owner or owner-relative occupancy;Withdrawal of the rental property from the rental market;Intent to demolish or substantially remodel the unit;Owner is complying with a local ordinance, court order, or other government entity resulting in the need to vacate the property.'

Not everyone receives the full $30K.Am I eligible for government assistance?

I came a cross a recent article in the WSJWorkforce multifamily housing for people between 80-120% of Area Media Income is probably the most needed type of housing in America, yet given land costs and construction costs, it is really difficult to make a deal work without government or non-profit type subsidies. 

This offer is contingent upon Buyer obtaining all requisite approvals from any governing body having jurisdiction for construction or development of the property as *** ____________________. *** Buyer is to have until _____________ to obtain approval in final, nonappealable form, upon conditions acceptable to Buyer and Seller or this contingency shall be deemed waived unless BUYER shall notify SELLER in writing no later than _________ 20____ of Buyer’s inability to obtain said approval.

When you purchase a condo, townhouse, or any other property that is governed by a Homeowners Association, you sign a contract that agrees to abide by the rules they currently have and any that they set forth in the future.

@michael eaton-byrdIt doesn't matter that you are switching it yo an llc, if you live there it's owner occupied and is governed by different rules

You can also check with the local government entity in charge of titling mobile homes in your area to see what paperwork is needed to transfer over title.

Whether they own that housing, or older landlords own it does not change the fact they they are living in said housing.The government debt problem funny enough is something that will drive housing prices higher over time.