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

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

I’m considering selling and using the proceeds to reinvest in a long term rental closer to where I live but before I do, I am curious if you think a rental management company may be able to help boost rentals, thus making this a profitable property? 

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.

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. 

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?

Get detailed quotes on these to ensure it’s cost-effective.Zoning & Permits: Verify that your current property allows additional homes and meets zoning requirements for multiple units.Rental Demand & ROI: Assess demand for singlewide rentals in your area to confirm it’ll be profitable after all expenses.If everything checks out, these could be solid additions to your portfolio.

If the continuing maintenance and repairs are more than you can afford and make the property cash-flow negative, I would sell and hope that the repairs I made and the appreciation would earn me some profit.

Focusing on growing capital, reinvesting profits, diversifying investments, and using tax strategies is crucial.

Sometimes paying taxes is actually the more profitable path!