In addition to a voucher, we require that the tenant be able to show income at least 1.5 time the monthly rent, as opposed to our regular tenants who must show 3.5 time monthly rent.

Each jurisdiction is different, but typically include a substantial deposit due same day up to full price deposited that day. 

ADU zone expansion is not certain, and even then who knows what the rules will be (owner-occupied requirement, etc).

In this case, correct, 1031 exchange is not available. 1031 exchange is property for property, and an interest in a partnership normally is not (with a few rare exceptions, so you may want someone knowledgeable to give you a second opinion for your particular situation, which requires reading your inheritance documents.)Whether or not you have any mitigation strategies totally depends on your specific situation and requires a one-on-one. 

Also since it's a 4-unit it would need to meet the sustainability requirement. 

First, is it required by law for a buyer to sign a buyer's agreement before they start touring homes?

.- Inspections: Some programs require annual property inspections to ensure compliance with their standards, which can occasionally be demanding.- Damage Risk: As with any tenant, there’s potential for property damage.

You'll have to meet higher ratio and FICO requirements. 

Quote from @Pamela Rivas: Hi Natasha,Here are some key points to consider about setting up a Mexican corporation:Setup Costs: $1,500–$3,000 USDOngoing Costs: $1,000–$2,000 USD/year (accounting and tax filings)Benefits: Tax deductions for expenses like maintenance, repairs, and managementBest for: Multiple properties or income-generating investmentsWhile a corporation is ideal for managing multiple properties, it’s NOT required to obtain an RFC.

Quote from @Jaren Taylor: Quote from @Stuart Udis: Depending on the transaction sizes you are pursuing, raising money to purchase property without debt requires either an incredible network of relationships or devoting a lot of time and effort to raising money.