There is space for a nice-sized kitchenette which will include a fridge, an electric stovetop with an external vent above, two countertop sections, a nice-sized sink, cabinets, and a pantry underneath the stairs. going to then add a small separate room for the water heater and stackable laundry unit.

Don't leave extra bedding out for them but have it available (like in a locked closet or storage cabinet) should it be requested.

Complete renovation of upstairs, all new flooring, knocked out wall in kitchen to open it up, all new cabinets and appliances.

One guest put all the stuff on the various bathroom countertops in the back of the cabinets.

However, with special windows, special exterior siding and upgraded cabinets, countertops and flooring they could run well into the $50Ks or even the $60Ks.Anyone else building 400sf for $150/sf.in San Diego right now?

My awesome husband owns a custom cabinet business and did 80% of all the work ourselves (sweat equity).

I already got new floors, re-did the entire kitchen(painted kitchen cabinets, installed new quartz countertops, new backsplash, painted kitchen pantry doors, painted the entire first floor a nice color white, installed recessed lighting on the first floor). 

They have the best prices on doors, windows, door knobs, hinges, and granite (lowes/homedepot have cheaper cabinets, but they carry higher quality ones).If you have just broken window panes, the "glass smith" does an excellent job repairing windows, but they aren't the cheapest installers (although still much cheaper than a general contractor).If you need general day laborers, the southside Presbyterian church in south Tucson is the place to go. 

Do you ever put in recessed medicine cabinets when one isn't already there? 

Improved the kitchens by repainting the cabinets/replacing them2.