@Anibal Mijangos - Rental arbitrage is a great business wherever you can find below-market rental units and favorable STR regulations in strong Airbnb markets. 

Regulating rent rates creates less inventory and higher prices.

Careful regulation and oversight are needed to ensure that such programs truly benefit those they aim to help without unintended negative consequences.

Rent-by-the-Room (Long-Term)If local regulations allow it, renting out units by the room might generate more income than traditional long-term leases.

@Eden Meng contact your Solo 401k administrator regarding regulations regarding leasing  mid term and long term rental properties.They should provide guidance regarding prohibited transactions.

Temperature control:  It's always naturally cooler downstairs, and in the heights of summer and winter, I just cannot get the temperature regulated for both me and my tenant to where we're both comfortable. 

Byzantine planning and landlording regulations.

Consider exploring financing options like FHA loans or conventional loans with low down payments, understanding local regulations, and conducting market research to ensure you can cover your costs.

@Jeremy D.2nd kitchen and you would need an ADU license, and of course needs to meet the adu requirements.An adu is not multifamily, so yeah cant have the 2 parts rented seperatly when you leave.Whats unclear as I dont think its adressed in the regulations, is if you have an ADU, would 5 persons be the total property limit.

Trump did not address housing as directly but has previously suggested cutting regulations and using federal land for new construction.Sharing this because it could have a significant impact on the housing market in the near and long term.