Hi Edgar,As an agent you will need to begin building your identity as a trusted advisor in home sales and purchases.

For example, a Burger King in the growing part of town is worth more than the Burger King in the crime-ridden part of town even if those two Burger Kings have identical lease structures.  

However if the property across the street is identical in every way and they have higher rents, that should be your market rent.If, in your 1950s building all the units are old and tired and you take one and make it beautiful, and it rents for twice the old and tired units, you can now see the potential from rehabbing units. 

Don't choose one because someone else was happy and recommended him, unless you know your situations are identical.

If the two units are identical you could split those expenses in half. 

Randomize the order, find some accepted cultural markers for coffee table books and decorations to switch out (when academics have done "resume research," they use names that are 90% one group or the other -- "Jake Smith" is generally a white dude, "Jamar Smith" is generally a black dude, so when Jake gets 50% more callbacks with an identical resume, there's good reason to suspect foul play). 

Check credit, criminal history, eviction history and verify identity and then income with the employer. 

They had identical floor plans. 

The payment process for you is identical to paying a regular mortgage except it goes to a different 'Pay To' address.

I would make separate sites and have a link to each other's site which will help with SEO and also give each it's own identity.