It seems like it basically up to you to do the math on how much more you will potentially make selling each unit individually and then deciding if that extra $$$ is worth the number of extra hours you will spend.

Quote from @Nicholas Dillon: Basic math on a napkin.When you cash out the equity, you borrow it from the bank.

I guess it boils down to finding out if I can qualify for a lower-interest loan with a traditional bank/credit union, and if not, making sure the math still works with a higher-interest loan.

Paper napkin math says skinny deal. 

If I did my math correctly, on a 3,600 SF triplex where you buy the land for $150k, you generate a gross profit of about $84k (based on a $140/sf build cost and sale price of $205/sf), before you pay interest on any borrowed funds or closing/commission costs.

But show them the math.  

Yes - include ALL expenses in your math, including reserves for repairs/maint, capex, turnover, etc.

However, for a commercial property or a commercial residential (5+ unit) property value is based on the income approach and reducing expenses in this case by producing electricity factors into that math and very well might increase the valuation enough to make sense.

Enodo (Multi-Family investors, developers and asset managers) its just math 6.

Slowly build out a repeatable process...if you continue to change things (as in different types of properties, different levels of renovation, different finish material, different neighborhoods, etc.) you create more variables and make it harder to solve to the problem.I am a math guy and less unknowns/variables you have the easier the problem will be to solve.