If you do it correctly, you have one side of the duplex paying most or all of your mortgage.  

Do you have any, or all, of the following experience and skills:Blue collarbackhoelicensed home installertransport driverelectricianplumberconcrete workremodelerOfficeresident intake and screeningresident relations/community relations/governmental relationsbookkeepingcollectionsWhite CollarCompliance Management SystemDeveloping and Implementing a Marketing Plan that makes sense for the style and location of the community you buy.Selling homes at a profit and closing the sale.Establishing some legal and compliant manner by which your prospective residents can obtain financing to purchase the homes you are selling.For 4 and 5 star communities with prospective residents who average credit score is above 660 you will need to develop good relationships with outside lenders.For lesser communities or for communities where the marketing is geared to draw residents with credit scores below 660, you will need to develop some form of seller finance.Developing consulting or vendor resources for areas where help is needed.The more you already know, the less outside help you are going to need.

@Gregg ReinboldHere we are {now} required to use resilient channel and 5/8" fire-rated drywall on both sides of common walls and ceilings/floors, along with fire rated insulation (such as Roxul Safe-n-Sound) in the cavity.  

Don't bother with oral contracts.

The inspection report had a vague comment like, "there may be something wrong with some or all of the appliances," so the buyers asked for the warranty.

If most or all of the following apply, you might want to seriously consider financing that next big depreciating purchase:You have a high tolerance for risk and are able to take on significant leverage. 

Is there a certain amount of cash flow that you want to achieve coupled with your consulting earnings and social security, are you looking for capital preservation, are you looking to continue to build wealth to hand it down to your children, relatives and charity, or all of the above?

I would not do all 5 at the same time since you do not know if some or all will move out and wreak havoc on cash flow.If you are going to remodel and then raise rents, you can space out the projects / tenant move out dates to suite your cash flow and rehab budget.You mentioned that the numbers work at a slightly lower offering price.

Commercial will be at least 20%.Ask the owner if they will carry back a 2nd position mortgage for some or all of downpayment.

The KPMG Global PropTech Survey 2019 confirms that 80% of firms still do not have “most or all” of their decision making led by data.The same report also hints at a “skills gap” — only 5% of real estate firms have transformation efforts led by someone with knowledge of data analytics.What would you say would be the challenges ahead of us in 2022?