I would say credit partnership meaning that someone allows me to use their qualifying credit to qualify for financing at the same time they are an equity partner on the deal who I split profits with? 

So you are putting in various inputs/assumptions, like gross revenue (total sales prices of homes) less soft costs, hard costs, city fees, desired profit margin (i.e. 15% of gross revenue) = residual value (what the land is worth).

If you want to make a business repeatable, scalable, less risky, and more profitable; you need to know what you are buying and selling or buying and renting.

All the rental income, appreciation and profit when selling is tax free!  

It has a lower turnover than STR but can bring in higher rent than traditional leases.Co-Living Arrangements: Renting rooms individually on a month-to-month basis could generate more income than a single long-term lease while reducing management hassle.Furnished Long-Term Rental: A furnished rental could allow for higher rent and attract tenants who don’t want the STR commitment but still value flexibility.Partner with a Local Boutique STR Manager: Some local companies manage STRs with lower fees than Airbnb's traditional managers and could help keep profits up without 20% fees.Hope that helps you with your decision!

If you do end up splitting profits and equity 50/50 then make sure you account for your management.

I was furious, and wanted to walk on the principal of the thing, but my wife talked me down on the fact that even at $3k higher it would be a good house - and it has turned out to be, another $100k+ profit. 

Proper setup from the start can prevent major issues and ensure you're profiting from the start!

You buy the property, you give the tenant notice of a pending increase, they pack up and leave, then you spruce it up and rent it at market rate so it's a profitable investment.When egg prices double, do you think the local grocer cries in his coffee every morning about how inflation is impacting his customers?

This method allows you to take some of the profit tax free and indefinitely defer the rest of tax, using it to purchase larger, nicer property/properties in areas with better cash flow potential.