All New Wiring, Plumbing, appliances, Countertops, Kitchen Cabinets, Bathroom Ceramic Tile.

We did all the work ourselves and with my dad, who is in construction and a tile expert.

I had it all removed to install tile.

I am looking at a 2600 sq house, new tile, counters, updated bath, paint and carpet, all cosmetic is 25k, so just saying you may want to re-look at the numbers. 

I like the tubs where they are freestanding but tiled in around them. 

I go with semi-gloss paint on all the walls and trim to make them easier to clean in the future.Bathrooms and kitchens - ceramic tile not sheet vinyl which can rip.Now that YOU have a chance to place the tenant, make sure you have a quality unit and don't settle for less than a quality tenant.

What is the most common type of flooring for kitchens, hardwood or tile? 

I have been leaning on possibly utilizing the wood looking tile plank, but haven't yet.What are your opinions on flooring for stairways?

The wiring originally installed that house was designed to run a few light bulbs and perhaps a radio or two (it's not uncommon to find a single circuit per floor or only 2-4 for the entire house) and not to handle today's array of electronics.The house of that vintage, the presence of asbestos in its many forms (pipe and duct wrap for the heating system, possibly mixed in plaster, floor tiles, exterior siding, etc) is a distinct possibility.Where I do not have experience is in local insect damage - I know you have termites and undoubtedly carpenter ants (or a close relation).  

You could look at tile flooring instead.