I know I likely leave something on the table doing this but I’ve had people not move out on the expected date and then been in a pickle for what to do about the new occupants who have made their arrangements to be in a certain date.

Ask yourself what you bring to the table and how you're a valid piece in the partnership.

I compared size, amenities, whether or not a property was rehabbed, parking, and location.

The advantage of the SBA financing is that you will only have to bring 10% to the table, but you will also have to show with the existing building and your Adjusted Gross income that you have the capacity to pay for the new debt. 

With more and more institutional investing jumping onboard, the halving, and now you can buy Bitcoin with Paypal or the Cash App or Robinhood is making it even easier for people to jump in with any size investment. 

Make sense about spreading costs out more, and building bigger since you'll always have the costs of the foundation, roof, etc regardless of the size. 

I do not have a sheet but I typically budget $150 for lawn, $150 for pool if applicable, $100 for cable, $100 for water, $300 a month for electric (depending on property size and your local utility costs), $50 for pest control, and another $200 per month in misc. 

They handle:Monthly Payment ProcessingEscrow for Taxes and Insurance: They ensure property taxes and insurance are paid, which is essential to protect your interest in the property.Record Keeping: They also maintain records, which can be invaluable if any issues arise during the term of the loan.ConclusionGiven the details of your property and the $200,000 sales price, a possible scenario could look like this:Down Payment: 10% ($20,000)Loan Amount: $180,000Interest Rate: 8%Amortization: 30 yearsMonthly Payment: Approximately $1,320 (principal and interest)Balloon Payment: Due in 5 or 7 years (this allows for refinancing or payoff while giving you some flexibility).These terms are flexible and can be adjusted based on the buyer’s credit, down payment size, and negotiation.

I want to provide access through the common wall of the two units of a duplex. nothing fancy, sort of a "doorway" without a door, same size of a door.

-Depending on the size of the deal, I may be able to set you up with the deal/loan-even if you do not have experience.