Or find a property that is under-utilized or has below market rents.Otherwise, you could also do the OPPOSITE of the great advice from @Jonathan Greene and buy a property with multi-bed units or live in the larger unit and rent out the smaller unit - while getting a roommate(s).

My landlords manage with Azibo, and we do tenant screening with RentSpree, but there are a lot of similar products out there.

Quote from @Jaycee Greene: @Shaylynn O'Leary well, that's at least someone with "eyes and ears" in the actual market. 

I'm currently reading David Greene's book on BRRRR and was curious about how you all go about planning or visualizing added rooms to potential purchases. 

@Jonathan Greene, I appreciate the advice especially on the costs.

Ask your tenant to use smell minimising products.

We do engineer hardwood and no Lux viynl like our competitors So all these things probably cost me 25k pre house but we have been selling them for 100k higher than Lennar for same sq ft and have created the highest priced development in town. we are approaching 400 a foot for finished product which was unheard of in Canby Oregon.U can see the homes and the finishs if you go to  Ivyridgeestatescanby  dot com. 

I agree with @Jonathan Greene on this.

Quote from @Brandon Croucier: No products 5% down on 2nd homes or investment, it not 08' just yet.

The best way to develop a solid SOW is this - you start off with what you are visualizing in your head, send drawings, pictures and products that you like.