If you had the following two options, which would you choose?

Option 1:  Spend $50,000 on a conversion from a huge basement garage to a mother-in-law unit that would increase your rent by $500 per month on an existing rental.

Option 2:  Spend $50,000 on a down payment on your next deal that should cashflow $200 per month after expenses, in addition to the loan paydown, appreciation, and tax benefits.