Calculate the costs of the loan and the entire project and calculate your expected profit.4) Make the offer on the one you feel best about and off you go!

InflationRising Costs: Inflation drives up the cost of materials, labor, and property maintenance, potentially shrinking profit margins.

The group gets a nice short term return, my landlord makes a share of that, agent fees and half of profit.

And as long as the amount you are using for investment meets your reinvestment target then you could live in one of the units as your primary for a while or forever.When you sell your current primary the 170K of profit will be tax- free. 

This could be a share of the profits or equity, typically in the 20-30% range, depending on the complexity and the workload.

A good solid profit but not enough to justify 20 months of work.

The biggest challenge I can see for this is that I hear it's a pain in the *** for the seller to go through a local community bank and confirm their income for their approval for a mortgage, and there are local/community banks that will approve 95-100% LTV loans based on how profitable the deal is.

To start, I’d like to ask you a question: What is more important, purchasing real estate where you can obtain 100% return of your capital through the BRRRR investment method but otherwise break even or even worse lose money or alternatively  leave some of your capital in the deal but earn a profit when the property is sold? 

This could range based on how much risk and work you're taking on versus their financial input.The key is to be clear and transparent about expectations, like how profits will be split and who is responsible for what.

To do it profitably?