I've heard that some mortgage types aren't eligible for subto, such as VA loans. 

Loans secured by two- to four-unit properties, investment properties, or second homes are not eligible. https://selling-guide.fanniemae.com/Selling-Guide/Originatio...However, there is NOT a state law against it but because of the above most lenders even if they are not selling to Fannie/Freddie do not allow it.

If you are flipping a lot of homes you could be considered a dealer and not be eligible for any capital gains treatment.

At present we show roughly 100 STR eligible coastal and multi family properties throughout the state of Oregon, at least half of which are active STR's and offered turn key furnished. 

Legal entities such as LLC's are not eligible for conforming loans, such as a conventional loan. 

Reduced down payments are possible for multifamily buildings using financing options such as FHA loans, which are less expensive than traditional loans.Find local programs that can help with a down payment, look up programs in your region, get in touch with lenders or mortgage brokers in your area, and fulfill the eligibility requirements by attending homebuyer education workshops.

You need legitimate self-employment activity or business with "earned" income to be eligible for a Solo 401k plan.You can't contribute passive income from schedule E, but earned self-employment income from schedule C is eligible, so your understanding is correct. 

Internal Revenue Code, unless their taxpayer guardian resides in the same unit.Property Ownership: Individuals or households that own real property are not eligible to occupy or lease the Affordable ADU.Liquid Asset Limitation: Eligibility is restricted to persons or households whose liquid assets do not exceed 110% of the annual Area Median Income.

@Katelyn NelsonIt might be intimidating to begin real estate investment, but it's crucial to familiarize yourself with the fundamentals.

David, rental income is passive income.Placing your rentals into an S-Corp usually doesn’t make sense from tax standpoint because you will be exposing all of the income to SE tax.If you have a portfolio of rental properties that you do manage yourself - you could set up a property management company and charge PM fees, this income will now be considered “earned” and eligible to contribute to a retirement account.