Our rent-by-the room residents appreciate a lockable bedroom door, a private bathroom, sufficient on-site parking, a large refrigerator and a large washer and dryer (in order of most to least important).

That curriculum you are following was designed for you by the school this way. 

House-hacking by room is a topic that pops up when we're late in the real estate cycle; in tier 1 areas multifamilies available are scarce or priced unreasonably so one is 'forced' to rent rooms instead of multifamilies.Things to consider:1) Exit strategy - are you forced to live on site and manage it? 

First, almost all properties are either placed with a broker for sale or directly listed on the major property sale websites.

Get a good architect first and design what you need don't jump the gun. 

I've heard of mentees who started cleaning up construction areas on a flip at the end of each work day or picking up supplies at Home Depot and delivering them to the job site.

Several of my STR investor clients here in Colorado have used a designer, and they generally pick a few statement pieces that they spend money on and then go with FB marketplace  or even IKEA for smaller items. 

Rob just updated everything...here is the site he tells everyone to visit for STR cost seg.STR Cost Seg

The best thing to do is look up property taxes on county/town websites to get an idea for specific properties.

My last one i requested a call so i could meet him at the site.