I believe I would be able to replace these tiles with porcelain tiling on my own; my main concern is the fact that they may be asbestos tiles.

I have come to the conclusion that a nice porcelain tile is a good tenant - proofing solution for flooring unless the property already had refinish-able hardwood flooring prior to my purchasing the property in which case I would keep the hardwoods.I am opposed to having carpeting for flooring because I feel it will be easily trashed.

It is a porcelain.

Most durable floor covering for kitchens/bath is porcelain tile.

If the factory isn't using, 5/16 or 3/4 inch plywood or at least CDX, 2x6 exterior wall construction, double pained tinted and rated windows, porcelain fixtures, granite or marble countertops, stainless steel fixtures, copper plumbing and upscale accessories they don't and will never git my biz. 

Porcelain tile will be run throughout the house.  

We put granite on all counters, porcelain tiles downstairs, walnut flooring upstairs, and we included 3 beautiful handmade black walnut barn-doors as well. 

The tup is porcelain coated steel, so about $150.  

There is a divot in the glass of our new stove top (my fault for a porcelain steel teapot) and the curtain tie backs keep getting bumped off the wall in one of the queen bedrooms.Other than that, no problems.

Subway tile isn't necessarily the cheapest option, you might want to look at some of the larger porcelain tiles, etc.