And it's a lot faster than tiling. 

I also replaced flooring repaired drywall, new cabinets, tile bathrooms and new toilets and fixtures.

The problem got worse quickly so I had to change the vinyl floor to tile to avoid the problem getting worse. 

Most small towns i have rentals in, I am viewed as the landlord that has the "nicest" properties in town(No granite here as they love the tile counters and the $3 backsplash)  However, in upscale areas I would consider having the worst properties at the bottom dollar price

If a contractor gives me a bid that I know is outrageous I can just walk outside pretend to call my husband and walk back in and say "hey, I confirmed with my husband that we only pay x/sqft for tile flooring, so that's the best I can do".

This includes the replacement of all burnt out light bulbs to their original wattage, sponge clean with appropriate cleaning agents of all tubs, sinks, showers, toilets, and countertops, moping of all ceramic tile floors, vacuuming all carpets, dusting of hardwood floors, cleaning all cobwebs on ceilings, floors, and walls.

(Just paint, tile, carpet, etc.)

I did all the flooring, painting, tile, appliances, and fixtures, which took over two years of my free time.

I also replaced flooring repaired drywall, new cabinets, tile bathrooms and new toilets and fixtures.

It's not legally called a kickback or referral, but for layman's terms, that's a good way to think of it - an incentive to pick that specific tile company over any other title company.