So spending 200k on an ADU will likely not increase your property value by 200k. 

Perhaps if your partner was a general contractor or handyman type there may be some merit there to reduce costs / increase profitability.If your partner enjoys deal sourcing, a better move might be for him to become an agent - so he could legally collect commissions from finding deals and managing properties for multiple people. 

Nearly fourteen years later I would say it was well worth it.

Yes, the 1% rule is getting harder, but hopefully rent prices will continue to increase as they have been trending.

My duplex - built 1989, 2,060 sf, 2 bed/bath, 1 year old roof, value if I subdivide (county already approved) and sell each separately $150k each ($300k total)Investor duplex - built 1995, 2,300 sf, 2 bed/bath, 5 year old roof, value around $310kThe investors initial request was for an equal trade and they would pay realtor fees, which I replied wouldn't be equal due to buying/selling costs (recording fees, title insurance, closing fee, survey, inspections, loan fees, 1031 fees, accountant fees, repairs), taxes would increase due to new sale price, I'd trade a 3.75% mortgage for a higher one, and I'm on the 10th year of a 30 year loan so resetting that to a new loan would restart amortization and pay more towards interest.

Additionally, confirm the transfer won’t lead to property reassessment, which could increase taxes.

For me, I could handle the increase in cost and still pay much less than If I got a 4/2 SF.

The only question is if the increased risk of loss is worth the extra return. 

However, I’m open to exploring opportunities in other cities or markets if the numbers make sense and align with my investment goals.If you know of any deals or markets worth considering or maybe even a deal lines up, I would love to know of it!

More on DSCR loans in case helpful: DSCR loans won't use your income to underwrite the loan.DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.