Can I do this without it messing up financing on a DSCR?

This expands your possibilities.

In this case, everything was done when the house was a primary. 

Purchase price: $28,000 Cash invested: $45,000 Bought this duplex in rough shape and fix them to rent them.

What strategies are you guys implementing to optimize this cost? 

John is right about the enemy method, its the only accurate way to estimate revenue.The blanket estimated revenue amounts on analysis websites like AirDNA can be a decent baseline, but generally include too big a pool of properties to give a very precise estimate.The way I use the enemy method: Sign up for a pricing software that has market analysis (I use PriceLabs but most of the pricing softwares have this feature).

Hope this helps. 

Purchase price: $270,000 Cash invested: $10,000 What made you interested in investing in this type of deal?

At this point I do not know where/what to do.

Should we do this or would it be better if we designed a postcard online to send out?