Another suggestion is for you to shop for a natural gas provider to reduce your costs.

If this was a standard rental process then yes, I'd recommend going through the process of applications/screening steps, a background check, and then require the deposit; since it sounds like the house is being rented to transient workers though, the very nature of the work situation calls for a bit more flexibility on the renting end. 

Side note: Keep in mind some items are naturally low profit margin work and some are high profit margin work.

[sic] Those two things seem contradictory in nature to me.

@Tuan Huynh I have several units that I medium term rent to travel nurses/doctors here in San Diego and in process of renovating and converting yet another...I personally love it...I thought I'd naturally have more vacancy than a long term rental but so far in this first year i've been trying this out, no vacancy yet.

While most medical professionals are good about planning for the future, the nature of how contracts get filled and where that takes the traveler often happen last minute. 

It’s human nature to give business to folks you like, so put yourself out there face to face, not just on social media 

One challenge when building small units is bringing in natural light as they tend to be long and narrow.  

This is merely the nature of the business. 2.  

Condotels that allow short term rentals, are considered to be non-warrantable condos for the single fact amongst a few others, that they are transient in nature, similar to a hotel.