However, as I've been tracking new listings in this area and running the numbers on them, I have realized this strategy has either gotten too much attention in the last few years or the supply just isn't there any more.

The cleaners do with it with supplies left in the supply closet. 

A lot of lenders used to apply 35% for expenses, but in the last several years, the numbers for supplies, labor, utilities, taxes, etc… have increased significantly.Also take into account the age, occupancy and how has the property been maintained, this will affect the expenses too

We are solely working on assisted living:- Buying homes and leasing them at higher than market rates to these business operators- Purchasing existing businesses with the real estate- Developing / building newFor us, the business makes the real estate cash flow, we can create a massive impact, and the demand outpaces supply and will continue to be that way for the next couple decades.

Add on rollers, tape, floor coverings, etc and it could easily be $300+ in supplies. 

Guillaume I would not make too many LLCs unless you are aggressively buying property since you have to file taxes on every LLC.

List the property on MLS or with a trusted real estate agent, and market aggressively through social media, local advertising, and open houses to generate interest.

They kept messing things up and hiding stuff from me and then would be aggressive towards me. 

You'll definitely get the long term appreciation in the San Diego market since our supply levels remain low which helps to insulate our market here, but it will be hard to cash flow on immediately unless you use one of the above strategies I mentioned. 

As far as ethically that is part of my nature and I don't care for the aggressive (potentially predatory) strategies discussed by others, but I see value in offering a transparent and convenient service with lower costs and faster turnarounds than traditional MLS transactions.