My neighbor replaced her en suite bathroom door with a frosted glass 3 panel barn door and it looks snazzy.  

Often, you can sell a furnace, panel, breakers, ac, water heater for some money too, in order to offset some costs. 

I work with Tesla Powerwall battery systems and Q-cell solar panels to find cost savings solutions and energy security for your properties.

There should be a piece of flexible conduit coming out from the bottom or side panel.

If the shower enclosure is in good shape and the remaining tile is just cosmetic pull it off, repair any drywall damage, and cover it with a shiplap or an accent wall panel (just make sure you use moisture-resistant materials). 

I served on an IMN panel about a decade ago with some big fund managers including Blackstone's Distressed Debt Fund with over $4B under management.

Once you have all this documented you should know what wire goes to what unit, an electrician can then add a new breaker panel/meter and rewire to split the electric to the 2 units.

If you remember the TIN Man the salesmen all pulled up in CADDY's of the day.Well at Boise the care was Jeep Wagoneer with the wood panels.

I am usually in the $2500-3500 range for cabinets, with 36" uppers, all fillers, panels and trim delivered.

Updated, new roof 2023, new hvac 2023, electrical panel rewired 2023.