It's area specific sometimes based on the taste but here in California my top 3 would be master bedroom with walk in closet, kitchen, and then yard if applicable.

Is it possible to consider potential income in the DTI for mortgage application?

I use the application of BP daily but I keep running into some complications such as mentioning people , adding and messaging certain people .

You'll want to see if it's 100% homestead, that's applicable if occupying the home and when it's 100% homestead taxes tend to be a bit cheaper, but when you buy it you'll sign a homestead exemption form that will eventually eliminate the homestead exemption.

We give a birthday card and $5 Starbucks cards with tenants birthdays (from the application) and a $15-20 Subway card at Christmastime.  

Alternatively a small business can run out of their basement etc.When economy is good business licenses applications are up.Not a big fan of office but that's just me.

F as in all your interested applicants are going to say F*** this place soon as they learn you allow child molesters to live there and empower them by leaving children's play sets in the yard!

It's not terribly difficult, and there are great tools on the website (sample tenant applications, tenant screening tips, etc) if you poke around the tools tab at the top.A couple pointers:  be aware of tenant anti-discrimination laws.  

BUT - if re-plat is greater than 4 Finish parcels, this adds more level of bureaucratic red tape involving planning and zoning commissions PLUS the city council.   

Do not hesitate, to post questions and bounce ideas around in applicable forums.