To play devil's advocate (and keep in mind I have no skin in this since I'm in a different market):-You want to tailor to investors, then be prepared to sell at an investor price. 

Sorry, no I don't. 

Then you’ll wipe out 4-5 years of cashflow and still have no appreciation. 

.: I’m currently renovating a rental property and exploring ways to manage costs without compromising on quality.

No RE deal will change your life with $25K of capital. 

Rising maintenance costs, turnover, Taxes, and other expenses will also contribute to this.  

In my market the valuation with f/f non commercial financing is typically lower than the hands off cost of adding the ADU.  

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

Although there is no pricing like you get in Ohio or much of the mid west or rust belt.. so much of those areas RE cost less than replacement cost even if the lots were free.. just is what it is..

Buy their equity over time with no intrest.